This patch makes the following changes:-
	1) Modify vpif_subdev_info to add board_info, routing information
	   and vpif interface configuration. Remove addr since it is
	   part of board_info

	2) Add code to setup channel mode and input decoder path for
	   vpif capture driver

Also incorporated comments against version v0 of the patch series and
added a spinlock to protect writes to common registers
Signed-off-by: Muralidharan Karicheri <m-karicheri2@ti.com>
Reviewed-by: Hans Verkuil <hverkuil@xs4all.nl>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>