Add OrangePi RV2 support with RISC-V KY platform

Implements complete board support for OrangePi RV2 including:
- New KY family configuration for RISC-V platform
- Custom U-Boot sources from OrangePi (v2022.10-ky branch)
- Custom kernel sources (orange-pi-6.6-ky branch)
- SPI NOR flash boot support with MTD partitioning
- Hardware support for WiFi (AP6256), Bluetooth, CAN, V4L
- BSP packages and platform-specific configurations
- Boot scripts and environment files

Board boots from SPI flash with specialized bootloader layout.

Based on OrangePi BSP adapted for current Armbian architecture.
https://github.com/orangepi-xunlong/orangepi-build.git

Tested:
- board booted from SPI (Bootloader updated by the OrangePi BSP) -> SD
  (image generated by Armbian)
- board booted from SPI -> NVMe SSD in the back slot
  (image generate by Armbian and dd-transfered to the SSD)
- ethernet and WiFi works

Author: tmshlvck

config/boards/orangepirv2.conf

@@ -0,0 +1,50 @@
+# OrangePi RV2 - RISC-V SoC with SPI flash boot
+BOARD_NAME="Orange Pi RV2"
+BOARDFAMILY="ky"
+BOARD_MAINTAINER="tmshlvck"
+KERNEL_TARGET="current,edge"
+BOOT_FDT_FILE="ky/x1_orangepi-rv2.dtb"
+BOOTDELAY=1
+SRC_EXTLINUX="yes"
+SRC_CMDLINE="console=ttyS0,115200 earlycon=sbi clk_ignore_unused swiotlb=65536"
+PACKAGE_LIST_BOARD="rfkill bluetooth bluez bluez-tools can-utils v4l-utils"
+#SKIP_BOOTSPLASH="yes" # Skip boot splash patch, conflicts with CONFIG_VT=yes
+
+function post_config_uboot_target__extra_configs_for_orangepi_rv2() {
+	display_alert "u-boot for ${BOARD}" "u-boot: enabling extra configs for SPI flash boot" "info"
+	run_host_command_logged scripts/config --enable CONFIG_SD_BOOT
+	run_host_command_logged scripts/config --enable CONFIG_EXT4_WRITE
+	run_host_command_logged scripts/config --enable CONFIG_FS_BTRFS
+	run_host_command_logged scripts/config --enable CONFIG_CMD_BTRFS
+	run_host_command_logged scripts/config --enable CONFIG_CMD_SF
+	run_host_command_logged scripts/config --enable CONFIG_SPI_FLASH
+	run_host_command_logged scripts/config --enable CONFIG_SPI_FLASH_MTD
+	run_host_command_logged scripts/config --enable CONFIG_CMD_MTD
+}
+
+function post_family_tweaks_bsp__orangepi_rv2_extras() {
+	display_alert "$BOARD" "Installing OrangePi RV2 specific configuration" "info"
+
+	if [[ -d "$SRC/packages/blobs/riscv64/ky" ]]; then
+		run_host_command_logged mkdir -pv "${destination}"/lib/firmware
+		display_alert "$BOARD" "Installing boot firmware" "info"
+		run_host_command_logged cp -fv $SRC/packages/blobs/riscv64/ky/esos.elf "${destination}"/lib/firmware
+	fi
+
+	# Force load wireless module if available
+	if [[ -f "${destination}"/etc/modules-load.d/${BOARD}.conf ]]; then
+		run_host_command_logged rm -f "${destination}"/etc/modules-load.d/${BOARD}.conf
+	fi
+	run_host_command_logged mkdir -pv "${destination}"/etc/modules-load.d
+
+	# Add wireless module for AP6256 if present
+	if [[ "${BOARD}x" == "orangepirv2x" ]]; then
+		echo "bcmdhd" > "${destination}"/etc/modules-load.d/${BOARD}.conf
+
+		# Copy WiFi firmware if available
+		if [[ -f "${SRC}/packages/blobs/ky/nvram_ap6256.txt" ]]; then
+			run_host_command_logged mkdir -pv "${destination}"/lib/firmware
+			run_host_command_logged cp -v "${SRC}/packages/blobs/ky/nvram_ap6256.txt" "${destination}"/lib/firmware/
+		fi
+	fi
+}

config/bootenv/ky.txt

@@ -0,0 +1,2 @@
+verbosity=1
+bootlogo=false

config/bootscripts/boot-ky.cmd

@@ -0,0 +1,57 @@
+# DO NOT EDIT THIS FILE
+#
+# Please edit /boot/orangepiEnv.txt to set supported parameters
+#
+
+setenv load_addr "0x9000000"
+setenv overlay_error "false"
+# default values
+setenv verbosity "1"
+setenv console "both"
+setenv bootlogo "false"
+setenv rootfstype "ext4"
+setenv docker_optimizations "on"
+setenv earlycon "on"
+
+echo "Boot script loaded from ${devtype} ${devnum}"
+
+#if test -e ${devtype} ${devnum} ${prefix}orangepiEnv.txt; then
+	load ${devtype} ${devnum} ${load_addr} ${prefix}orangepiEnv.txt
+	env import -t ${load_addr} ${filesize}
+#fi
+
+if test "${logo}" = "disabled"; then setenv logo "logo.nologo"; fi
+
+if test "${console}" = "display" || test "${console}" = "both"; then setenv consoleargs "console=tty1"; fi
+if test "${console}" = "serial" || test "${console}" = "both"; then setenv consoleargs "console=ttyS0,115200 ${consoleargs}"; fi
+if test "${earlycon}" = "on"; then setenv consoleargs "earlycon=sbi ${consoleargs}"; fi
+if test "${bootlogo}" = "true"; then setenv consoleargs "bootsplash.bootfile=bootsplash.orangepi ${consoleargs}"; fi
+
+setenv bootargs "mtdparts=${mtdparts} root=${rootdev} rootwait rootfstype=${rootfstype} ${consoleargs} consoleblank=0 loglevel=${verbosity} ubootpart=${partuuid} clk_ignore_unused swiotlb=65536 workqueue.default_affinity_scope=system usb-storage.quirks=${usbstoragequirks} ${extraargs} ${extraboardargs}"
+
+if test "${docker_optimizations}" = "on"; then setenv bootargs "${bootargs} cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory swapaccount=1"; fi
+
+load ${devtype} ${devnum} ${ramdisk_addr_r} ${prefix}uInitrd
+load ${devtype} ${devnum} ${kernel_addr_r} ${prefix}Image
+
+load ${devtype} ${devnum} ${fdt_addr_r} ${prefix}dtb/${fdtfile}
+fdt addr ${fdt_addr_r}
+fdt rm /soc/lcd_backlight phandle
+fdt resize 65536
+for overlay_file in ${overlays}; do
+	if load ${devtype} ${devnum} ${load_addr} ${prefix}dtb/ky/overlay/${overlay_prefix}-${overlay_file}.dtbo; then
+		echo "Applying kernel provided DT overlay ${overlay_prefix}-${overlay_file}.dtbo"
+		fdt apply ${load_addr} || setenv overlay_error "true"
+	fi
+done
+for overlay_file in ${user_overlays}; do
+	if load ${devtype} ${devnum} ${load_addr} ${prefix}overlay-user/${overlay_file}.dtbo; then
+		echo "Applying user provided DT overlay ${overlay_file}.dtbo"
+		fdt apply ${load_addr} || setenv overlay_error "true"
+	fi
+done
+
+booti ${kernel_addr_r} ${ramdisk_addr_r} ${fdt_addr_r}
+
+# Recompile with:
+# mkimage -C none -A arm -T script -d /boot/boot.cmd /boot/boot.scr