clk_tree: Add basic clock support for esp32h2

- Support SOC ROOT clock source switch
- Support CPU frequency change
- Support RTC SLOW clock source switch
- Support RTC SLOW clock + RC FAST calibration

Remove FPGA build for esp32h2

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

@@ -136,6 +136,7 @@
 #define  APB_CLK_FREQ_ROM                            ( 32*1000000 )
 #define  CPU_CLK_FREQ_ROM                            APB_CLK_FREQ_ROM
 #define  EFUSE_CLK_FREQ_ROM                          ( 20*1000000)
+#define  CPU_CLK_FREQ_MHZ_BTLD                       (64)               // The cpu clock frequency (in MHz) to set at 2nd stage bootloader system clock configuration
 #define  CPU_CLK_FREQ                                APB_CLK_FREQ
 #if CONFIG_IDF_ENV_FPGA
 #define  APB_CLK_FREQ                                ( 32*1000000 )