ENGR00172084 MX6Q: Add 4 capture modes for ov5642

ENGR00172084 MX6Q: Add 4 capture modes for ov5642

capture modes included:
 VGA(640x480)@15fps
 QVGA(320x240)@15fps
 NTSC(720x480)@15fps
 PAL(720x576)@15fps

in order to test it:
mxc_v4l2_capture.out -iw 640 -ih 480 -ow 640 -oh 480 -r 0 -fr 15 -m 0 test.yuv
mxc_v4l2_capture.out -iw 320 -ih 240 -ow 320 -oh 240 -r 0 -fr 15 -m 1 test.yuv
mxc_v4l2_capture.out -iw 720 -ih 480 -ow 720 -oh 480 -r 0 -fr 15 -m 2 test.yuv
mxc_v4l2_capture.out -iw 720 -ih 480 -ow 720 -oh 576 -r 0 -fr 15 -m 3 test.yuv

Signed-off-by: Daiane Angolini <daiane.angolini@freescale.com>