media: imx: vdic: Fix wrong CSI group ID

The i.MX7 capture support forgot to change the group ID for the CSI
to the IPU CSI in VDIC sub-device, it was left at the i.MX7 CSI
group ID.

Fixes: 67673ed5 ("media: staging/imx: rearrange group id to take in account IPU")

Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>