media: v4l: subdev: Remove stream-unaware sub-device state access

Remove stream-unaware sub-device state access functions and macros. These
are no longer used.

[Sakari Ailus: Resolve a minor conflict in removed code.]

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>