Some targets control the ADV7180 power pin via a gpio, so add
optional support for "powerdown" pin control.
Signed-off-by: NSteve Longerbeam <steve_longerbeam@mentor.com>
Tested-by: NTim Harvey <tharvey@gateworks.com>
Acked-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>