UPSTREAM: mmc_utils: doc: add man-page

Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
(cherry picked from commit 44f94b925894577f9ffcf2c418dd013a5e582648)
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>

BUG=none
TEST=Compiled, Installed on gnawty

Change-Id: Ic5d088aa87c4d311271c866d31ed0e5f77f0efee
Reviewed-on: https://chromium-review.googlesource.com/338084
Commit-Ready: Gwendal Grignou <gwendal@chromium.org>
Tested-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Grant Grundler <grundler@chromium.org>
1 file changed