drivers: video: mcux_csi: Don't set_format() in get_format()

Do not set_format() when doing get_format(). This design seems initially
to simplify the sample (just get_format() and everything works out of the
box) but it makes thing incomprehensive and error prone.

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

Author: ngphibang

drivers/video/video_mcux_csi.c

@@ -184,8 +184,8 @@ static int video_mcux_csi_get_fmt(const struct device *dev, struct video_format
 #if defined(CONFIG_VIDEO_MCUX_MIPI_CSI2RX)
 		video_pix_fmt_convert(fmt, true);
 #endif
-		/* align CSI with source fmt */
-		return video_mcux_csi_set_fmt(dev, fmt);
+
+		return 0;
 	}
 
 	return -EIO;