1. add some efuse api to get rtc & digital voltage 2. set dig_rtc voltage to a fix value storing in efuse no mater which cpu frequency 3. modify hardware code in bootloader to fit all c3 ECO3 version
1. add some efuse api to get rtc & digital voltage 2. set dig_rtc voltage to a fix value storing in efuse no mater which cpu frequency 3. modify hardware code in bootloader to fit all c3 ECO3 version