drivers/video/intelfb/intelfbdrv.c: add missing agp_backend_release

Release bridge, as done on all other paths out of the function.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
1 file changed