xilinx: v4l2: dma: Bug fix in single plane support

xilinx: v4l2: dma: Bug fix in single plane support

This patch fixes bugs in single plane handling.
 a. Passing v4l2 pixel format to framebuffer driver
 b. Making dst_icg is zero, though it does not matter
    in case of single plane formats
 c. Correcting bytes per line for single plane 10 bit
    formats

Signed-off-by: Satish Kumar Nagireddy <satishna@xilinx.com>
Reviewed-by: Hyun Kwon <hyun.kwon@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>