configs: rockchip: enable gpio-leds driver for Radxa boards

Basically, Radxa's boards are intended to turn LEDs on at U-Boot.
enable gpio-leds driver and led command.

Signed-off-by: FUKAUMI Naoki <naoki@radxa.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/configs/radxa-cm3-io-rk3566_defconfig b/configs/radxa-cm3-io-rk3566_defconfig
index f60beba..2655fdc 100644
--- a/configs/radxa-cm3-io-rk3566_defconfig
+++ b/configs/radxa-cm3-io-rk3566_defconfig
@@ -39,6 +39,8 @@
 CONFIG_SPL_CLK=y
 CONFIG_ROCKCHIP_GPIO=y
 CONFIG_SYS_I2C_ROCKCHIP=y
+CONFIG_LED=y
+CONFIG_LED_GPIO=y
 CONFIG_MISC=y
 CONFIG_SUPPORT_EMMC_RPMB=y
 CONFIG_MMC_DW=y