media: imx: imx7-media-csi: Drop unneeded pad checks

The subdev core guarantees that the .set_fmt() operation is always
called with a valid pad. Drop the unneeded pad checks.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Adam Ford <aford173@gmail.com> #imx8mm-beacon-kit
Acked-by: Rui Miguel Silva <rmfrfs@gmail.com>
Tested-by: Martin Kepplinger <martin.kepplinger@puri.sm>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/platform/nxp/imx7-media-csi.c

@@ -1936,6 +1936,7 @@ static int imx7_csi_try_fmt(struct imx7_csi *csi,
 		sdformat->format.quantization = in_fmt->quantization;
 		sdformat->format.ycbcr_enc = in_fmt->ycbcr_enc;
 		break;
+
 	case IMX7_CSI_PAD_SINK:
 		*cc = imx7_csi_find_mbus_format(sdformat->format.code);
 		if (!*cc) {
@@ -1947,8 +1948,6 @@ static int imx7_csi_try_fmt(struct imx7_csi *csi,
 		if (sdformat->format.field != V4L2_FIELD_INTERLACED)
 			sdformat->format.field = V4L2_FIELD_NONE;
 		break;
-	default:
-		return -EINVAL;
 	}
 
 	imx7_csi_try_colorimetry(&sdformat->format);
@@ -1968,9 +1967,6 @@ static int imx7_csi_set_fmt(struct v4l2_subdev *sd,
 	struct v4l2_subdev_format format;
 	int ret = 0;
 
-	if (sdformat->pad >= IMX7_CSI_PADS_NUM)
-		return -EINVAL;
-
 	mutex_lock(&csi->lock);
 
 	if (csi->is_streaming) {