db845c: Remove gralloc_gbm implmentation

Now that we've switched to minigbm, we can
drop the gralloc_gbm logic.

Signed-off-by: John Stultz <john.stultz@linaro.org>
Change-Id: Ie96970faf0b005f5ac6702a2212e078bb5f5fb5c
5 files changed