soc: Remove soc_legacy folder and move ARM Kconfig

Removes the soc_legacy folder which is left over from the
transition to hwmv2 and moves the Kconfig for ARM to arch

Signed-off-by: Jamie McCrae <[email protected]>

arch/arm/Kconfig

@@ -82,4 +82,47 @@ config ARM_ON_EXIT_CPU_IDLE
 rsource "core/Kconfig"
 rsource "core/Kconfig.vfp"
 
+# General options signifying CPU capabilities of ARM SoCs
+config CPU_HAS_ARM_MPU
+	bool
+	select CPU_HAS_MPU
+	help
+	  This option is enabled when the CPU has a Memory Protection Unit (MPU)
+	  in ARM flavor.
+
+config CPU_HAS_NXP_MPU
+	bool
+	select CPU_HAS_MPU
+	help
+	  This option is enabled when the CPU has a Memory Protection Unit (MPU)
+	  in NXP flavor.
+
+config CPU_HAS_CUSTOM_FIXED_SOC_MPU_REGIONS
+	bool "Custom fixed SoC MPU region definition"
+	help
+	  If enabled, this option signifies that the SoC will
+	  define and configure its own fixed MPU regions in the
+	  SoC definition. These fixed MPU regions are currently
+	  used to set Flash and SRAM default access policies and
+	  they are programmed at boot time.
+
+config CPU_HAS_ARM_SAU
+	bool
+	select CPU_HAS_TEE
+	help
+	  MCU implements the ARM Security Attribution Unit (SAU).
+
+config CPU_HAS_NRF_IDAU
+	bool
+	select CPU_HAS_TEE
+	help
+	  MCU implements the nRF (vendor-specific) Security Attribution Unit.
+	  (IDAU: "Implementation-Defined Attribution Unit", in accordance with
+	  ARM terminology).
+
+config HAS_SWO
+	bool
+	help
+	  When enabled, indicates that SoC has an SWO output
+
 endmenu