[nrf fromtree] drivers: nrf_qspi_nor: Activate QSPI peripheral when enabling XIP

The way that the QSPI peripheral is activated has been changed in
nrfx 3.2.0. Now the peripheral is not activated during the driver
initialization. Instead, the driver activates the peripheral when
the first operation is requested or when `nrfx_qspi_activate()` is
called. In case of XIP, the latter needs to be used, as there may
be no standard operation request.

Signed-off-by: Andrzej Głąbek <[email protected]>
(cherry picked from commit 1081df9)

Author: anangl

drivers/flash/nrf_qspi_nor.c

@@ -1457,6 +1457,9 @@ void z_impl_nrf_qspi_nor_xip_enable(const struct device *dev, bool enable)
 	nrf_qspi_xip_set(NRF_QSPI, enable);
 #endif
 	qspi_lock(dev);
+	if (enable) {
+		(void)nrfx_qspi_activate(false);
+	}
 	dev_data->xip_enabled = enable;
 	qspi_unlock(dev);