v4l2-common doesn't have to be a module for it to call request_module().
Just remove that test.

Thanks-to: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>