fstab: Add external sdcard support

Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Change-Id: I1b6bd84ed4fa6e51b68fdc67901e943354da3696
diff --git a/fstab.common b/fstab.common
index b23e7f8..dbba930 100644
--- a/fstab.common
+++ b/fstab.common
@@ -4,3 +4,4 @@
 # specify MF_CHECK, and must come before any filesystems that do specify MF_CHECK
 /dev/block/platform/soc@0/1d84000.ufshc/by-name/userdata /data		ext4	discard,noatime,noauto_da_alloc,data=ordered,user_xattr,barrier=1,inlinecrypt	wait,formattable,fileencryption=aes-256-xts:aes-256-cts:v2+inlinecrypt_optimized
 /dev/block/by-name/metadata	/metadata	ext4	noatime,nosuid,nodev,discard					wait,formattable
+/devices/platform/soc@0/8804000.sdhci/mmc_host/mmc*	auto	auto	defaults	voldmanaged=sdcard1:auto