arch: arm: rename CPU_HAS_NXP_MPU to align with binding

Following the binding rename to "nxp,sysmpu", update the Kconfig
option to align with the binding name and to better reflect the
option's purpose.

Signed-off-by: Manuel Argüelles <manuel.arguelles@nxp.com>

soc/nxp/kinetis/k2x/CMakeLists.txt

@@ -9,7 +9,7 @@ zephyr_sources(
   soc.c
   )
 
-if(DEFINED CONFIG_ARM_MPU AND DEFINED CONFIG_CPU_HAS_NXP_MPU)
+if(DEFINED CONFIG_ARM_MPU AND DEFINED CONFIG_CPU_HAS_NXP_SYSMPU)
   # MK22F12 series MCUs have NXP MPU
   zephyr_sources(nxp_mpu_regions.c)
 endif()

soc/nxp/kinetis/k2x/Kconfig

@@ -45,4 +45,4 @@ config SOC_MK22F12
 	select CPU_HAS_FPU
 	select HAS_MCUX_DAC
 	select HAS_MCUX_RCM
-	select CPU_HAS_NXP_MPU
+	select CPU_HAS_NXP_SYSMPU

soc/nxp/kinetis/k6x/Kconfig

@@ -7,7 +7,7 @@ config SOC_SERIES_KINETIS_K6X
 	select ARM
 	select CPU_CORTEX_M4
 	select CPU_CORTEX_M_HAS_DWT
-	select CPU_HAS_NXP_MPU
+	select CPU_HAS_NXP_SYSMPU
 	select HAS_MCUX_PIT
 	select CLOCK_CONTROL
 	select SOC_RESET_HOOK

soc/nxp/kinetis/k8x/Kconfig

@@ -8,7 +8,7 @@ config SOC_SERIES_KINETIS_K8X
 	select ARM
 	select CPU_CORTEX_M4
 	select CPU_CORTEX_M_HAS_DWT
-	select CPU_HAS_NXP_MPU
+	select CPU_HAS_NXP_SYSMPU
 	select CPU_HAS_FPU
 	select CLOCK_CONTROL
 	select HAS_MCUX

soc/nxp/kinetis/ke1xf/Kconfig

@@ -8,7 +8,7 @@ config SOC_SERIES_KINETIS_KE1XF
 	select ARM
 	select CPU_CORTEX_M4
 	select CPU_CORTEX_M_HAS_DWT
-	select CPU_HAS_NXP_MPU
+	select CPU_HAS_NXP_SYSMPU
 	select CPU_HAS_FPU
 	select CLOCK_CONTROL
 	select HAS_MCUX

soc/nxp/s32/s32k1/Kconfig

@@ -7,7 +7,7 @@ config SOC_SERIES_S32K1
 	select ARM
 	select HAS_NXP_S32_HAL
 	select HAS_MCUX
-	select CPU_HAS_NXP_MPU
+	select CPU_HAS_NXP_SYSMPU
 	select CPU_HAS_CUSTOM_FIXED_SOC_MPU_REGIONS
 	select MPU_ALLOW_FLASH_WRITE if !XIP
 	select CLOCK_CONTROL