Add DT compatible strings for the VSP2 instances found in the R-Car Gen3
SoCs and support them in the vsp1 driver.
Signed-off-by: NLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>