uboot-imx

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>