Currently on platforms designed for Windows, connections between CIO2 and
sensors are not properly defined in DSDT. This patch extends the ipu3-cio2
driver to compensate by building software_node connections, parsing the
connection properties from the sensor's SSDB buffer.

[Sakari Ailus: Make cio2_bridge_init static inline to a fix compiler
	       warning, wrapped a bunch of long lines.]
Suggested-by: NJordan Hand <jorhand@linux.microsoft.com>
Reviewed-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: NAndy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: NKieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: NDaniel Scally <djrscally@gmail.com>
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+huawei@kernel.org>