[nrf fromlist] drivers: adc: nrfx: SAADC power consumption and neg samples fixes#3190

nordicjm merged 2 commits intonrfconnect:mainnrfconnect/sdk-zephyr:mainfrom

jaz1-nordic:nrfx-8200_saadc_fixesjaz1-nordic/ncs-sdk-zephyr:nrfx-8200_saadc_fixesCopy head branch name to clipboard