minigbm: fix typo in PRESUBMIT.cfg

minigbm: fix typo in PRESUBMIT.cfg

Now clang-format will be run everytime a committer runs repo upload
with the --no-verify option. The committer will have to resolve
differences, i.e:

1) add clang-format off / clang-format on.
2) change files such that clang-format does not complain.

Since our version of clang-format was updated (in the LLVM ebuild), I had to
resolve a few conflicts in rockchip.c and tegra.c.

BUG=none
TEST=none

Change-Id: Ia32d3c47243957f2d674f142bda9daf7917aab0b
Reviewed-on: https://chromium-review.googlesource.com/506508
Commit-Ready: Gurchetan Singh <gurchetansingh@chromium.org>
Tested-by: Gurchetan Singh <gurchetansingh@chromium.org>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>