drm/gma500: fix things after get/put page helpers
drm/gma500: fix things after get/put page helpers

Commit 8b9ba7a3 'drm/gma500: use gem get/put page helpers' was missing a
line, which resulted in garbled screen.

Signed-off-by: Rob Clark <915c10c999604870200b6defbe633d857c856ca0@gmail.com>
Tested-by: Guillaume CLÉMENT <3b9efcf0dcc9fb33b0355f12fedfe498e1880012@baobob.org>
Signed-off-by: Dave Airlie <f2295d84e358395675bc8031be58672073ae065e@redhat.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs