platform: nordic_nrf: Replace deprecated API with new one

This commit replaces API that became deprecated with the release
of nrfx2.9 - see CHANGELOG in NordicSemiconductor:nrfx repository
https://github.com/NordicSemiconductor/nrfx/blob/v2.9.0/CHANGELOG.md

NCSDK-11947

Change-Id: Ie9fd4c4be09f6b78022f30b219c67d94a9c454ad
Signed-off-by: Adam Wojasinski <adam.wojasinski@nordicsemi.no>
Signed-off-by: Joakim Andersson <joakim.andersson@nordicsemi.no>
6 files changed