mediatek: mt7622: enable CONFIG_SPI_MTK_NOR

Somehow this got disabled in the transition to 5.10.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

target/linux/mediatek/mt7622/config-5.10

@@ -387,7 +387,7 @@ CONFIG_SPI=y
 CONFIG_SPI_MASTER=y
 CONFIG_SPI_MEM=y
 CONFIG_SPI_MT65XX=y
-# CONFIG_SPI_MTK_NOR is not set
+CONFIG_SPI_MTK_NOR=y
 CONFIG_SPI_MTK_SNFI=y
 CONFIG_SRCU=y
 CONFIG_SWCONFIG=y