fix error.

Author: chainsx

config/boards/licheepi-4a.conf

@@ -4,7 +4,7 @@ BOARDFAMILY="thead"
 KERNEL_TARGET="current"
 FULL_DESKTOP="yes"
 BOOT_LOGO="desktop"
-BOOT_FDT_FILE="thead/ligh-lpi4a.dtb"
+BOOT_FDT_FILE="thead/light-lpi4a.dtb"
 SRC_EXTLINUX="yes"
 SRC_CMDLINE="console=ttyS0,115200 rootwait rw earlycon clk_ignore_unused loglevel=7 eth=$ethaddr rootrwoptions=rw,noatime rootrwreset=yes"
 BOOTCONFIG="light_lpi4a_defconfig"