[media] media: davinci: vpbe: add support for VIDIOC_CREATE_BUFS

this patch adds support for vidioc_create_bufs. Along side
remove unneeded member numbuffers.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

include/media/davinci/vpbe_display.h

@@ -70,8 +70,6 @@ struct vpbe_disp_buffer {
 
 /* vpbe display object structure */
 struct vpbe_layer {
-	/* number of buffers in fbuffers */
-	unsigned int numbuffers;
 	/* Pointer to the vpbe_display */
 	struct vpbe_display *disp_dev;
 	/* Pointer pointing to current v4l2_buffer */