[media] V4L: add an IMX074 sensor soc-camera / v4l2-subdev driver

This patch adds an initial driver for the IMXъ74 image sensor from Sony.
Lacking documentation, only very basic functionality in one specific image
format has been implemented and tested.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>