board: ge: bx50v3: mount rootfs read-only

Change the kernel command line to mount the root filesystem read-only in
order to be able to run filesystem check on it on boot.

Signed-off-by: Hannu Lounento <hannu.lounento@ge.com>
Signed-off-by: Martyn Welch <martyn.welch@collabora.co.uk>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>

include/configs/ge_bx50v3.h

@@ -117,7 +117,7 @@
 	"emmcdev=1\0" \
 	"partnum=1\0" \
 	"setargs=setenv bootargs console=${console},${baudrate} " \
-		"root=/dev/${rootdev} rw rootwait cma=128M " \
+		"root=/dev/${rootdev} ro rootwait cma=128M " \
 		BX50V3_BOOTARGS_EXTRA "\0" \
 	"loadimage=" \
 		"ext2load ${dev} ${devnum}:${partnum} ${loadaddr} ${image}\0" \