drivers: video: ov5640: Add some controls

Add some controls:
- hue
- saturation
- brightness
- contrast
- gain
- hflip
- vflip
- power line frequency filter
- pixel rate (read-only) which is needed for changing frame rate

Signed-off-by: Farah Fliss <farah.fliss@nxp.com>
Signed-off-by: Phi Bang Nguyen <phibang.nguyen@nxp.com>