xtensa: imply CONFIG_ARCH_HAS_RESERVED_PAGE_FRAMES if MMU

The Zephyr linker script usually puts something before
z_mapped_start (where .text is), for example, vecbase vectors.
So we need to reserve those space or else k_mem_map() would be
mapping those which may result in faults.

To avoid mapping there, CONFIG_ARCH_HAS_RESERVED_PAGE_FRAMES
needs to be used. Since it is common when MMU is enabled, we
should enable it by default using imply. All current Xtensa
MMU SoCs all have this selected anyway. Using 'imply' instead
of 'select' is to allow it to be disabled if so desired.

Signed-off-by: Daniel Leung <daniel.leung@intel.com>

arch/Kconfig

@@ -138,6 +138,7 @@ config XTENSA
 	select ARCH_HAS_THREAD_PRIV_STACK_SPACE_GET if USERSPACE
 	select ARCH_SUPPORTS_COREDUMP_STACK_PTR if !SMP
 	select ARCH_HAS_USERSPACE if XTENSA_MMU || XTENSA_MPU
+	imply ARCH_HAS_RESERVED_PAGE_FRAMES if XTENSA_MMU
 	help
 	  Xtensa architecture
 

soc/cdns/dc233c/Kconfig

@@ -10,6 +10,5 @@ config SOC_XTENSA_DC233C
 	select CPU_HAS_DCACHE
 	select CPU_HAS_ICACHE
 	select CPU_HAS_MMU
-	select ARCH_HAS_RESERVED_PAGE_FRAMES if XTENSA_MMU
 	select ARCH_SUPPORTS_COREDUMP
 	select ARCH_SUPPORTS_COREDUMP_PRIV_STACKS

soc/intel/intel_adsp/ace/Kconfig

@@ -12,7 +12,6 @@ config SOC_SERIES_INTEL_ADSP_ACE
 	select DW_ICTL_ACE
 	select SOC_HAS_RUNTIME_NUM_CPUS
 	select HAS_PM
-	select ARCH_HAS_RESERVED_PAGE_FRAMES if MMU
 	select ARCH_HAS_GDBSTUB
 
 config SOC_SERIES_INTEL_ADSP_ACE15