stm32: add default kernel config option CONFIG_LEDS_CLASS_MULTICOLOR

The generic target configuration activates the
CONFIG_LEDS_CLASS_MULTICOLOR option. Do not deactivate it for the stm32
target.

Signed-off-by: jonathan brophy <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/17277
[Reword commit message]
Signed-off-by: Hauke Mehrtens <[email protected]>

target/linux/stm32/stm32mp1/config-6.6

@@ -274,7 +274,6 @@ CONFIG_KERNEL_GZIP=y
 CONFIG_KMAP_LOCAL=y
 CONFIG_KMAP_LOCAL_NON_LINEAR_PTE_ARRAY=y
 # CONFIG_LEDS_BRIGHTNESS_HW_CHANGED is not set
-# CONFIG_LEDS_CLASS_MULTICOLOR is not set
 CONFIG_LEDS_GPIO=y
 CONFIG_LEDS_TRIGGER_CPU=y
 CONFIG_LEDS_TRIGGER_ONESHOT=y