drivers: media: i2c: Add streams support to IMX519

Add the V4L2 streams API support for embedded data in the IMX519 device
driver. This also updates the drier to use the V4L2 subdev state API.

Signed-off-by: Naushir Patuck <[email protected]>
Signed-off-by: Jacopo Mondi <[email protected]>

Author: naushir