media: common: saa7146: add support for missing .vidioc_try_fmt_vbi_cap

Support for VIDIOC_TRY_FMT for the vbi device was missing.
Add it.

This fixes a V4L2 compliance issue.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/common/saa7146/saa7146_video.c

@@ -515,6 +515,7 @@ const struct v4l2_ioctl_ops saa7146_video_ioctl_ops = {
 const struct v4l2_ioctl_ops saa7146_vbi_ioctl_ops = {
 	.vidioc_querycap             = vidioc_querycap,
 	.vidioc_g_fmt_vbi_cap        = vidioc_g_fmt_vbi_cap,
+	.vidioc_try_fmt_vbi_cap      = vidioc_g_fmt_vbi_cap,
 	.vidioc_s_fmt_vbi_cap        = vidioc_g_fmt_vbi_cap,
 	.vidioc_g_std                = vidioc_g_std,
 	.vidioc_s_std                = vidioc_s_std,