mediatek: add missing config symbol

Signed-off-by: David Bauer <mail@david-bauer.net>

target/linux/mediatek/mt7622/config-5.10

@@ -227,6 +227,7 @@ CONFIG_IRQ_TIME_ACCOUNTING=y
 CONFIG_IRQ_WORK=y
 CONFIG_JBD2=y
 CONFIG_JUMP_LABEL=y
+# CONFIG_KEYBOARD_MTK_PMIC is not set
 CONFIG_LEDS_UBNT_LEDBAR=y
 CONFIG_LIBFDT=y
 CONFIG_LLD_VERSION=0

target/linux/mediatek/mt7623/config-5.10

@@ -260,6 +260,7 @@ CONFIG_IRQ_WORK=y
 CONFIG_JBD2=y
 CONFIG_KALLSYMS=y
 CONFIG_KCMP=y
+# CONFIG_KEYBOARD_MTK_PMIC is not set
 CONFIG_LEDS_MT6323=y
 # CONFIG_LEDS_UBNT_LEDBAR is not set
 CONFIG_LIBFDT=y

target/linux/mediatek/mt7629/config-5.4

@@ -212,6 +212,7 @@ CONFIG_IRQ_DOMAIN_HIERARCHY=y
 CONFIG_IRQ_FORCED_THREADING=y
 CONFIG_IRQ_TIME_ACCOUNTING=y
 CONFIG_IRQ_WORK=y
+# CONFIG_KEYBOARD_MTK_PMIC is not set
 # CONFIG_LEDS_BRIGHTNESS_HW_CHANGED is not set
 # CONFIG_LEDS_UBNT_LEDBAR is not set
 CONFIG_LIBFDT=y