rockchip: rk3308-rock-pi-s: Enable LED and IO Domain driver

Add LED=y and LED_GPIO=y to support the onboard leds.

Add ROCKCHIP_IODOMAIN=y to configure correct io voltage domains.

Add DM_MDIO=y now that the DT contain a Ethernet phy node.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/configs/rock-pi-s-rk3308_defconfig b/configs/rock-pi-s-rk3308_defconfig
index e450a06..54f7744 100644
--- a/configs/rock-pi-s-rk3308_defconfig
+++ b/configs/rock-pi-s-rk3308_defconfig
@@ -38,10 +38,14 @@
 # CONFIG_USB_FUNCTION_FASTBOOT is not set
 CONFIG_ROCKCHIP_GPIO=y
 CONFIG_SYS_I2C_ROCKCHIP=y
+CONFIG_LED=y
+CONFIG_LED_GPIO=y
+CONFIG_ROCKCHIP_IODOMAIN=y
 CONFIG_SUPPORT_EMMC_RPMB=y
 CONFIG_MMC_DW=y
 CONFIG_MMC_DW_ROCKCHIP=y
 CONFIG_PHY_REALTEK=y
+CONFIG_DM_MDIO=y
 CONFIG_DM_ETH_PHY=y
 CONFIG_ETH_DESIGNWARE=y
 CONFIG_GMAC_ROCKCHIP=y