drivers: video: mt9m114: Rework to support more resolutions

Currently, the driver supports only VGA resolution while 480x272 is
needed to match with the display resolution on i.MX RT10XX family.

Also, the current framerate is very low, about 3-4 fps without doing
anything else with the image buffers (just discarding them).

Rework the driver to address the low framerate issue as well as to add
support for 480x272 and 1280x720 resolutions.

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