mx6cuboxi: Fix the mmc device for the rootfs

After the conversion to DM_MMC, the rootfs becomes mmc 1, so
adjust it accordingly.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
diff --git a/include/configs/mx6cuboxi.h b/include/configs/mx6cuboxi.h
index 55717c7..1a06f29 100644
--- a/include/configs/mx6cuboxi.h
+++ b/include/configs/mx6cuboxi.h
@@ -57,7 +57,7 @@
 	"console=" CONSOLE_DEV ",115200\0" \
 	"bootm_size=0x10000000\0" \
 	"mmcdev=" __stringify(CONFIG_SYS_MMC_ENV_DEV) "\0" \
-	"finduuid=part uuid mmc 0:1 uuid\0" \
+	"finduuid=part uuid mmc 1:1 uuid\0" \
 	"update_sd_firmware=" \
 		"if test ${ip_dyn} = yes; then " \
 			"setenv get_cmd dhcp; " \