atomic: Select missing ATOMIC_OPERATIONS_BUILTIN

The ATOMIC_OPERATIONS_* Kconfig option is not a choice, so it does not
have a default. However, the file that determines which actual atomic
operations backend will be used does default to
ATOMIC_OPERATIONS_BUILTIN:

https://github.com/zephyrproject-rtos/zephyr/blob/3e537db71ea277ccf98adcc9e05707701e53d084/include/zephyr/sys/atomic.h#L26-L41

Since we want to ensure that all SoCs intentionally select the atomic
operations backend they want to use, select it at the SoC level for all
SoCs, as well as for the Cortex-M arch when the Armv8-M baseline profile
is selected.

Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>

Author: carlescufi

arch/arm/core/cortex_m/Kconfig

@@ -192,6 +192,7 @@ config CPU_CORTEX_M_HAS_CMSE
 
 config ARMV6_M_ARMV8_M_BASELINE
 	bool
+	select ATOMIC_OPERATIONS_BUILTIN if ARMV8_M_BASELINE
 	select ATOMIC_OPERATIONS_C if !ARMV8_M_BASELINE
 	select ISA_THUMB2
 	help

soc/cdns/dc233c/Kconfig

@@ -5,6 +5,7 @@
 config SOC_XTENSA_DC233C
 	select XTENSA
 	select XTENSA_HAL
+	select ATOMIC_OPERATIONS_BUILTIN
 	select ARCH_HAS_THREAD_LOCAL_STORAGE
 	select CPU_HAS_DCACHE
 	select CPU_HAS_ICACHE

soc/espressif/esp32/Kconfig

@@ -5,6 +5,7 @@ config SOC_SERIES_ESP32
 	select XTENSA
 	select CLOCK_CONTROL
 	select DYNAMIC_INTERRUPTS
+	select ATOMIC_OPERATIONS_BUILTIN
 	select ARCH_HAS_GDBSTUB
 	select ARCH_SUPPORTS_COREDUMP
 	select PINCTRL

soc/espressif/esp32s3/Kconfig

@@ -4,6 +4,7 @@
 config SOC_SERIES_ESP32S3
 	select XTENSA
 	select DYNAMIC_INTERRUPTS
+	select ATOMIC_OPERATIONS_BUILTIN
 	select ARCH_SUPPORTS_COREDUMP
 	select CLOCK_CONTROL
 	select PINCTRL

soc/nxp/imxrt/imxrt6xx/Kconfig

@@ -22,6 +22,8 @@ config SOC_MIMXRT685S_CM33
 config SOC_MIMXRT685S_HIFI4
 	select XTENSA
 	select XTENSA_HAL if ("$(ZEPHYR_TOOLCHAIN_VARIANT)" != "xcc" && "$(ZEPHYR_TOOLCHAIN_VARIANT)" != "xt-clang")
+	select ATOMIC_OPERATIONS_BUILTIN if "$(ZEPHYR_TOOLCHAIN_VARIANT)" != "xcc"
+	select ATOMIC_OPERATIONS_ARCH if "$(ZEPHYR_TOOLCHAIN_VARIANT)" = "xcc"
 	select XTENSA_RESET_VECTOR
 	select XTENSA_USE_CORE_CRT1
 	select CLOCK_CONTROL