[media] v4l: omap4iss: Don't reinitialize the video qlock at every streamon

Initialize the spin lock once only when initializing the video object.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

diff --cc drivers/staging/media/omap4iss/iss_video.c
Simple merge