This configuration bit is required for ADC operation as well and hence
should not be cleared in the RNG API sequence.
Ideally, the ADC driver should take care of initializing this bit but
still the RNG layer change is required because of interleaved API usage
scenario described in following linked issue.
Closes https://github.com/espressif/esp-idf/issues/14124
Closes https://github.com/espressif/esp-idf/issues/14280