[nrf noup] board: nordic_ thingy53: Enable QSPI by default

The Thingy:53 enabled MCUboot and external flash by default.
Therefore, it should also enable drivers for its external
flash by default.

Signed-off-by: Sigurd Hellesvik <sigurd.hellesvik@nordicsemi.no>
(cherry picked from commit 20671bc)

Author: hellesvik-nordic

boards/nordic/thingy53/Kconfig.defconfig

@@ -97,6 +97,9 @@ config MCUBOOT_USB_SUPPORT
 	bool
 	default n
 
+config NORDIC_QSPI_NOR
+	default y
+
 endif # BOARD_THINGY53_NRF5340_CPUAPP || BOARD_THINGY53_NRF5340_CPUAPP_NS
 
 if BOARD_THINGY53_NRF5340_CPUNET