[media] v4l: vsp1: Make rwpf operations independent of video device

The rwpf queue operation doesn't queue a buffer but sets the memory
address for the next run. Rename it to set_memory and pass it a new
structure independent of the video buffer than only contains memory
information.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>