The initial configuration provided for the nrfx_power driver cannot
contain just default values, as that mean that DC/DC converters are
to be disabled, while those converters may be (and they actually are
by default for many boards) enabled through Kconfig.

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

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>