media: ARM: dts: sama5d4: enable Hantro G1 VDEC

Add the SAMA5D4 VDEC module which comprises Hantro G1 video decoder
core.

Cc: Rob Herring <robh+dt@kernel.org>
Cc: Frank Rowand <frowand.list@gmail.com>
Cc: devicetree@vger.kernel.org
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>