media: imx: Fix VDIC CSI1 selection

When using VDIC with CSI1, make sure to select the correct CSI in
IPU_CONF.

Fixes: f0d9c892 ("[media] media: imx: Add IC subdev drivers")

Suggested-by: Marek Vasut <marex@denx.de>
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Acked-by: Steve Longerbeam <steve_longerbeam@mentor.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>