soc: esp32: add Espressif HAL config

Current Espressif porting requires standard include as
part of hal implementation. compiler_flags.cmake checks for
variant name to keep those stdinc in build.
Instead of using variant name as check, use this new CONFIG
to make it clear and to allow having toolchain integrated
in zephyr-sdk package.
stdinc dependency in hal_espressif will be worked out and removed
soon.

Signed-off-by: Sylvio Alves <sylvio.alves@espressif.com>

cmake/compiler/gcc/compiler_flags.cmake

@@ -106,7 +106,7 @@ set_compiler_property(PROPERTY cstd -std=)
 
 if (NOT CONFIG_NEWLIB_LIBC AND
     NOT COMPILER STREQUAL "xcc" AND
-    NOT ZEPHYR_TOOLCHAIN_VARIANT STREQUAL "espressif" AND
+    NOT CONFIG_HAS_ESPRESSIF_HAL AND
     NOT CONFIG_NATIVE_APPLICATION)
   set_compiler_property(PROPERTY nostdinc -nostdinc)
   set_compiler_property(APPEND PROPERTY nostdinc_include ${NOSTDINC})

modules/Kconfig

@@ -13,6 +13,7 @@ source "modules/Kconfig.civetweb"
 source "modules/Kconfig.cmsis"
 source "modules/Kconfig.cypress"
 source "modules/Kconfig.eos_s3"
+source "modules/Kconfig.esp32"
 source "modules/Kconfig.imx"
 source "modules/Kconfig.infineon"
 source "modules/Kconfig.libmetal"

modules/Kconfig.esp32

@@ -0,0 +1,6 @@
+# Copyright (c) 2022 Espressif Systems (Shanghai) Co., Ltd.
+# SPDX-License-Identifier: Apache-2.0
+
+config HAS_ESPRESSIF_HAL
+	bool
+	depends on SOC_ESP32 || SOC_ESP32S2 || SOC_ESP32C3

soc/riscv/esp32c3/Kconfig.soc

@@ -10,6 +10,7 @@ config SOC_ESP32C3
 	select CLOCK_CONTROL_ESP32
 	select PINCTRL
 	select XIP
+	select HAS_ESPRESSIF_HAL
 
 if SOC_ESP32C3
 

soc/xtensa/esp32/Kconfig.soc

@@ -11,6 +11,7 @@ config SOC_ESP32
 	select ARCH_SUPPORTS_COREDUMP
 	select PINCTRL
 	select XIP
+	select HAS_ESPRESSIF_HAL
 
 if SOC_ESP32
 

soc/xtensa/esp32s2/Kconfig.soc

@@ -10,6 +10,7 @@ config SOC_ESP32S2
 	select CLOCK_CONTROL_ESP32
 	select PINCTRL
 	select XIP
+	select HAS_ESPRESSIF_HAL
 
 if SOC_ESP32S2