V4L/DVB (7668): soc-camera: Remove redundant return

This obviously redundant return has been in the driver from the very first
version. Remove it.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>