bluetooh: controller: Force ICACHE and DCACHE select on nRF SoCs

The ICACHE and DCACHE must be enabled when using Bluetooth stack
on nRF54h20 radio core. If it is not, then real time requirements
are not met and the stack will not work. To make sure a user
doesn't try to run an application with caches disabled force
its selection when building Bluetooth controller.

Having both caches enabled is also benefitial on other nRF SoCs,
hence the change makes ICACHE and DCACHE to be selected if
a CPU has CPU_HAS_ICACHE or CPU_HAS_DCACHE selected.

Signed-off-by: Piotr Pryga <[email protected]>

Author: ppryga-nordic

subsys/bluetooth/controller/Kconfig

@@ -9,6 +9,8 @@ config BT_LL_SOFTDEVICE
 	default y
 	select HAS_BT_CTLR
 	select MPSL
+	select ICACHE if CPU_HAS_ICACHE
+	select DCACHE if CPU_HAS_DCACHE
 	select ZERO_LATENCY_IRQS if !SOC_SERIES_BSIM_NRFXX
 	select BT_CTLR_CRYPTO_SUPPORT
 	select BT_CTLR_ENTROPY_SUPPORT