fix(wdt): changed ESP32-C3 WDT to use XTAL as clock

This clock is unchanged even when CPU/APB frequency changes (e.g. due to esp_pm),
which means timeout period is correct even after such a change.

components/soc/esp32c3/include/soc/Kconfig.soc_caps.in

@@ -731,6 +731,10 @@ config SOC_TIMER_GROUP_TOTAL_TIMERS
     int
     default 2
 
+config SOC_MWDT_SUPPORT_XTAL
+    bool
+    default y
+
 config SOC_TWAI_CONTROLLER_NUM
     int
     default 1

components/soc/esp32c3/include/soc/clk_tree_defs.h

@@ -334,7 +334,7 @@ typedef enum {
 typedef enum {
     MWDT_CLK_SRC_XTAL = SOC_MOD_CLK_XTAL,           /*!< Select XTAL as the source clock */
     MWDT_CLK_SRC_APB = SOC_MOD_CLK_APB,             /*!< Select APB as the source clock */
-    MWDT_CLK_SRC_DEFAULT = SOC_MOD_CLK_APB,         /*!< Select APB as the default clock choice */
+    MWDT_CLK_SRC_DEFAULT = SOC_MOD_CLK_XTAL,         /*!< Select APB as the default clock choice */
 } soc_periph_mwdt_clk_src_t;
 
 //////////////////////////////////////////////////LEDC/////////////////////////////////////////////////////////////////

components/soc/esp32c3/include/soc/soc_caps.h

@@ -327,6 +327,9 @@
 #define SOC_TIMER_GROUP_SUPPORT_APB       (1)
 #define SOC_TIMER_GROUP_TOTAL_TIMERS      (2)
 
+/*--------------------------- WATCHDOG CAPS ---------------------------------------*/
+#define SOC_MWDT_SUPPORT_XTAL              (1)
+
 /*-------------------------- TWAI CAPS ---------------------------------------*/
 #define SOC_TWAI_CONTROLLER_NUM         1UL
 #define SOC_TWAI_CLK_SUPPORT_APB        1