Move drmModeAddFB into omap_bo

We do RmFB from omap_bo, so this patch moves addFB in as well. This
patch also does a bit of clean up in the omap_dumb.c file.

BUG=chrome-os-partner:12889
TEST=Tested on snow, ensured nothing regressed

Change-Id: I768bc69ef43add6a7aa730be9b39380ebf7f0292
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/31919
Reviewed-by: St├ęphane Marchesin <marcheu@chromium.org>
Reviewed-by: Mandeep Singh Baines <msb@chromium.org>
Reviewed-by: John Sheu <sheu@chromium.org>
6 files changed