drivers: video: add min_line_count and max_line_count to video_caps

Add min and max line count to the video_caps structure- these fields can
be used by applications to determine the size of video buffer they need
to allocate for a video endpoint

The min and max line count fields are designed to enable supporting
endpoints that may produce or consume partial frames within each video
buffer, and may support arbitrarily sized video buffers.

Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>