media: davinci: fix incorrect pix_fmt assignment

There's a mistakenly written self assignment in
`static int vpfe_enum_fmt_vid_cap(..)`.

Fixed it according to Prabhakar Lad's feedback.

Signed-off-by: Cengiz Can <cengiz@kernel.wtf>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/platform/davinci/vpfe_capture.c

@@ -880,7 +880,7 @@ static int vpfe_enum_fmt_vid_cap(struct file *file, void  *priv,
 	/* Fill in the information about format */
 	pix_fmt = vpfe_lookup_pix_format(pix);
 	if (pix_fmt) {
-		fmt->pixelformat = fmt->pixelformat;
+		fmt->pixelformat = pix_fmt->pixelformat;
 		return 0;
 	}
 	return -EINVAL;