[nrf fromlist] drivers: timer: grtc: Add LFPRC as the source of GRTC#2200

rlubos merged 1 commit intonrfconnect:mainnrfconnect/sdk-zephyr:mainfrom

adamkondraciuk:NRFX-6629-Add-LFPRC-clock-selectionadamkondraciuk/sdk-zephyr:NRFX-6629-Add-LFPRC-clock-selectionCopy head branch name to clipboard