samples: video: Add support for smartdma video on FRDM_MCXN236

Add support for using the SMARTDMA engine on the FRDM-MCXN236 board with
the video capture sample.
Replace console pins, because default console pins(P1_8, P1_9) are
duplicated with camera header pins.

Signed-off-by: Neil Chen <cheng.chen_1@nxp.com>