rb3: Fix mmc-sdcard requirement and add u-boot branch to clone from

Change-Id: Ia349c9e03c8741525858ff51959a3902785aec9f
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
1 file changed
tree: ac53536dbc13260133600373f32c2a9b45672cf2
  1. docs/
  2. .gitignore
  3. .readthedocs.yaml