nrf: Extend plat_test.c to implement functions needed for psa-arch-tests

Add logging, timer, and memory functionality.

This adds functions that are not used in the TF-M code, but are called
from the psa-arch-tests nrf platform.

Change-Id: I1e149356b426302dbc125d0db9e7add4d331bfd7
Signed-off-by: Øyvind Rønningstad <oyvind.ronningstad@nordicsemi.no>
5 files changed