board: ge: bx50v3: Enable CONFIG_DM_MMC

Use MMC device model, and remove USDHC pin configuration code since the
pinctrl driver is used.

Signed-off-by: Ian Ray <ian.ray@ge.com>
diff --git a/include/configs/ge_bx50v3.h b/include/configs/ge_bx50v3.h
index 3336578..bb3c65e 100644
--- a/include/configs/ge_bx50v3.h
+++ b/include/configs/ge_bx50v3.h
@@ -45,10 +45,6 @@
 #define CONFIG_LBA48
 #endif
 
-/* MMC Configs */
-#define CONFIG_FSL_USDHC
-#define CONFIG_SYS_FSL_ESDHC_ADDR      0
-
 /* USB Configs */
 #ifdef CONFIG_USB
 #define CONFIG_USB_MAX_CONTROLLER_COUNT 2
@@ -82,7 +78,7 @@
 	"image=/boot/fitImage\0" \
 	"fdt_high=0xffffffff\0" \
 	"dev=mmc\0" \
-	"devnum=1\0" \
+	"devnum=2\0" \
 	"rootdev=mmcblk0p\0" \
 	"quiet=quiet loglevel=0\0" \
 	"console=" CONSOLE_DEV "\0" \