Backport new atomisp from upstream kernel

[lucasdemarchi]

Atomisp has been merged as a staging driver on upstream. Backport to 4.4.x to replace our current version

[lkm1321]

Hi, I'm trying this out myself just for fun. I have a question.
The current OV8858 driver seems to use struct v4l2_subdev_video_ops to pass the getter/setter functions for format while the mainline driver seems to use struct v4l2_subdev_pad_ops uses v4l2_subdev_pad_ops to do the same. Is this intended? V4L2 docs say that subdev_video_ops is inteded for 'video' operations while pad_ops is for 'pad-level' operations, whatever that means.

[zehortigoza]

@lkm1321 the drivers in Intel Aero kernel is previous to the internal api change in v4l2, I did it to ov7251 https://github.com/zehortigoza/linux-next/commit/6d8d326b1fcd6a10df12403ca7dfebd97ed1ef26