[media] v4l: vsp1: Support multi-input entities

Rework the route configuration code to support entities with multiple
sink pads.

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

diff --cc drivers/media/platform/vsp1/vsp1_entity.c
Simple merge

diff --cc drivers/media/platform/vsp1/vsp1_entity.h
Simple merge

diff --cc drivers/media/platform/vsp1/vsp1_hsit.c
Simple merge

diff --cc drivers/media/platform/vsp1/vsp1_lif.c
Simple merge

diff --cc drivers/media/platform/vsp1/vsp1_lut.c
Simple merge

diff --cc drivers/media/platform/vsp1/vsp1_rpf.c
Simple merge

diff --cc drivers/media/platform/vsp1/vsp1_sru.c
Simple merge

diff --cc drivers/media/platform/vsp1/vsp1_uds.c
Simple merge

diff --cc drivers/media/platform/vsp1/vsp1_video.c
Simple merge

diff --cc drivers/media/platform/vsp1/vsp1_wpf.c
Simple merge