minigbm: dri: Don't redefine GL typedefs

minigbm: dri: Don't redefine GL typedefs

dri_interface.h now #includes GL/gl.h so there is no need to define
these.

BUG=b:143621384
TEST=build/deploy minigbm and arc-cros-gralloc for grunt
Cq-Depend: chromium:1907530
Change-Id: Ic370dc1404156c8e5de5dc9490a8c68b49661c00
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/minigbm/+/1912763
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
Commit-Queue: Ilja H. Friedel <ihf@chromium.org>
Tested-by: Ilja H. Friedel <ihf@chromium.org>