drivers/flash/nrf_qspi_nor: fix for missing device deactivation.

anomaly_122_init() and anomaly_122_uninit() procedures implement
proper activate and deactivate procedures which are required for
achieve low power consumption.
The real workaround for the anomaly is buried inside hal function
nrf_qspi_disable() is called indirectly by the anomaly_122_uninit().

Therefore anomaly_122_init/uninit should be called for any
nrf QSPI device.

This patch renames functions and make call to them mandatory.
This fixes increased power consumtion issue on nRF53 device when
qspi was used.

Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>