arm64: defconfig: enable the Cadence QSPI controller

Enable the Cadence QSPI controller driver that is on the Stratix10 and
Agilex platforms.
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>

arch/arm64/configs/defconfig

@@ -211,6 +211,7 @@ CONFIG_MTD_NAND_DENALI_DT=y
 CONFIG_MTD_NAND_MARVELL=y
 CONFIG_MTD_NAND_QCOM=y
 CONFIG_MTD_SPI_NOR=y
+CONFIG_SPI_CADENCE_QUADSPI=y
 CONFIG_BLK_DEV_LOOP=y
 CONFIG_BLK_DEV_NBD=m
 CONFIG_VIRTIO_BLK=y