ti_armv7_common: env: Consolidate MMC args

Define default mmc args in ti_armv7_common.h so that all
TI platforms can reuse.

Reported-by: Yan Liu <yan-liu@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
diff --git a/include/configs/ti_armv7_common.h b/include/configs/ti_armv7_common.h
index 18fca02..1a4b6d9 100644
--- a/include/configs/ti_armv7_common.h
+++ b/include/configs/ti_armv7_common.h
@@ -58,6 +58,14 @@
 	"ramdisk_addr_r=0x88080000\0" \
 	"bootm_size=0x10000000\0"
 
+#define DEFAULT_MMC_TI_ARGS \
+	"mmcdev=0\0" \
+	"mmcrootfstype=ext4 rootwait\0" \
+	"args_mmc=setenv bootargs console=${console} " \
+		"${optargs} " \
+		"root=${mmcroot} " \
+		"rootfstype=${mmcrootfstype}\0"
+
 /*
  * Default to a quick boot delay.
  */