odroid-c2: enable new Meson GX MMC driver in board defconfig

Enable new Meson GX MMC driver in Odroid C2 defconfig.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
diff --git a/configs/odroid-c2_defconfig b/configs/odroid-c2_defconfig
index 2cf5011..00da76e 100644
--- a/configs/odroid-c2_defconfig
+++ b/configs/odroid-c2_defconfig
@@ -14,7 +14,10 @@
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_OF_CONTROL=y
 CONFIG_NET_RANDOM_ETHADDR=y
-# CONFIG_MMC is not set
+CONFIG_MMC=y
+CONFIG_DM_MMC=y
+CONFIG_MMC_MESON_GX=y
+CONFIG_CMD_MMC=y
 CONFIG_DM_ETH=y
 CONFIG_ETH_DESIGNWARE=y
 CONFIG_PINCTRL=y