soc: arm: silabs_exx32: Select CPU DWT feature symbol

The Data Watchpoint and Trace (DWT) is an optional debug unit for the
Cortex-M family cores (except ARMv6-M; i.e. M0 and M0+) that provides
watchpoints, data tracing and system profiling capabilities.

Signed-off-by: Stephanos Ioannidis <root@stephanos.io>

soc/arm/silabs_exx32/efm32pg12b/Kconfig.series

@@ -8,6 +8,7 @@ config SOC_SERIES_EFM32PG12B
 	select HAS_SILABS_GECKO
 	select HAS_SWO
 	select CPU_CORTEX_M4
+	select CPU_CORTEX_M_HAS_DWT
 	select CPU_HAS_FPU
 	select SOC_FAMILY_EXX32
 	select HAS_SYS_POWER_STATE_SLEEP_1

soc/arm/silabs_exx32/efm32wg/Kconfig.series

@@ -6,6 +6,7 @@
 config SOC_SERIES_EFM32WG
 	bool "EFM32WG Series MCU"
 	select CPU_CORTEX_M4
+	select CPU_CORTEX_M_HAS_DWT
 	select CPU_HAS_FPU
 	select SOC_FAMILY_EXX32
 	select HAS_SILABS_GECKO

soc/arm/silabs_exx32/efr32fg1p/Kconfig.series

@@ -8,6 +8,7 @@ config SOC_SERIES_EFR32FG1P
 	select HAS_SILABS_GECKO
 	select HAS_SWO
 	select CPU_CORTEX_M4
+	select CPU_CORTEX_M_HAS_DWT
 	select CPU_HAS_FPU
 	select SOC_FAMILY_EXX32
 	select HAS_SYS_POWER_STATE_SLEEP_1

soc/arm/silabs_exx32/efr32mg12p/Kconfig.series

@@ -6,6 +6,7 @@
 config SOC_SERIES_EFR32MG12P
 	bool "EFR32MG12P Series MCU"
 	select CPU_CORTEX_M4
+	select CPU_CORTEX_M_HAS_DWT
 	select CPU_HAS_FPU
 	select CPU_HAS_ARM_MPU
 	select SOC_FAMILY_EXX32