mediatek: fix typo in kernel mt7623/config-5.10

Fix typo reported by github user @mans0n.

Signed-off-by: Daniel Golle <[email protected]>

target/linux/mediatek/mt7623/config-5.10

@@ -229,7 +229,7 @@ CONFIG_HARDIRQS_SW_RESEND=y
 CONFIG_HAS_DMA=y
 CONFIG_HAS_IOMEM=y
 CONFIG_HAS_IOPORT_MAP=y
-CINFIG_HAVE_ARM_ARCH_TIMER=y
+CONFIG_HAVE_ARM_ARCH_TIMER=y
 CONFIG_HAVE_SMP=y
 CONFIG_HDMI=y
 CONFIG_HIGHMEM=y