modules: hal_nordic: Fix workaround for nRF52 anomaly 197 in nrf_power

Update the hal_nordic module revision to get the following commit:

nrf_power: Fix implementation of workaround for nRF52 anomaly 197

Since the workaround increases power consumption in System ON IDLE,
it should be applied only when the DC/DC converter for REG0 stage is
to be enabled, not regardless of the applied setting as it was done
so far.

Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>