am335x: igep003x: Add Device Tree Support and DM_MMC driver

This adds device tree and the DM_MMC driver for the AM335x IGEP based
boards.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
diff --git a/configs/am335x_igep003x_defconfig b/configs/am335x_igep003x_defconfig
index 186c65f..0a8fead 100644
--- a/configs/am335x_igep003x_defconfig
+++ b/configs/am335x_igep003x_defconfig
@@ -41,6 +41,9 @@
 # CONFIG_CMD_UBIFS is not set
 CONFIG_ENV_IS_IN_UBI=y
 CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
+CONFIG_DEFAULT_DEVICE_TREE="am335x-base0033"
+CONFIG_OF_CONTROL=y
+CONFIG_DM_MMC=y
 CONFIG_MMC_OMAP_HS=y
 CONFIG_NAND=y
 CONFIG_MTD_UBI_FASTMAP=y