rockchip: rockpro64: enable leds

The Rockpro64 has some GPIO leds so let's enable them so the
user gets some output in early boot.

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/configs/rockpro64-rk3399_defconfig b/configs/rockpro64-rk3399_defconfig
index e6f7a84..b0c3527 100644
--- a/configs/rockpro64-rk3399_defconfig
+++ b/configs/rockpro64-rk3399_defconfig
@@ -42,6 +42,8 @@
 CONFIG_SATA_SIL=y
 CONFIG_ROCKCHIP_GPIO=y
 CONFIG_SYS_I2C_ROCKCHIP=y
+CONFIG_LED=y
+CONFIG_LED_GPIO=y
 CONFIG_MISC=y
 CONFIG_ROCKCHIP_EFUSE=y
 CONFIG_MMC_DW=y