ledc: Add support for esp32h2; Refactor ledc driver clock source selection related code

LEDC examples and test cases are supported on ESP32H2.
   Switch to use general clock IDs for ledc_clk_cfg_t enum values.
   Deprecate LEDC_USE_RTC8M_CLK.

components/soc/esp32h4/include/soc/clk_tree_defs.h

@@ -344,6 +344,24 @@ typedef enum {
     MWDT_CLK_SRC_DEFAULT = SOC_MOD_CLK_APB,         /*!< Select APB as the default clock choice */
 } soc_periph_mwdt_clk_src_t;
 
+//////////////////////////////////////////////////LEDC/////////////////////////////////////////////////////////////////
+
+/**
+ * @brief Array initializer for all supported clock sources of LEDC
+ */
+#define SOC_LEDC_CLKS {SOC_MOD_CLK_XTAL, SOC_MOD_CLK_AHB, SOC_MOD_CLK_RC_FAST}
+
+/**
+ * @brief Type of LEDC clock source, reserved for the legacy LEDC driver
+ */
+typedef enum {
+    LEDC_AUTO_CLK = 0,                              /*!< LEDC source clock will be automatically selected based on the giving resolution and duty parameter when init the timer*/
+    LEDC_USE_APB_CLK = SOC_MOD_CLK_AHB,             /*!< Select APB(=AHB) as the source clock */
+    LEDC_USE_RC_FAST_CLK = SOC_MOD_CLK_RC_FAST,     /*!< Select RC_FAST as the source clock */
+    LEDC_USE_XTAL_CLK = SOC_MOD_CLK_XTAL,           /*!< Select XTAL as the source clock */
+
+    LEDC_USE_RTC8M_CLK __attribute__((deprecated("please use 'LEDC_USE_RC_FAST_CLK' instead"))) = LEDC_USE_RC_FAST_CLK,   /*!< Alias of 'LEDC_USE_RC_FAST_CLK' */
+} soc_periph_ledc_clk_src_legacy_t;
 
 #ifdef __cplusplus
 }