media: rzg2l-cru: Remove `channel` member from `struct rzg2l_cru_csi`

media: rzg2l-cru: Remove `channel` member from `struct rzg2l_cru_csi`

Remove the CSI virtual channel number from `struct rzg2l_cru_csi`.
Instead, pass the CSI virtual channel number as an argument to
`rzg2l_cru_csi2_setup()`.

Suggested-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Link: https://lore.kernel.org/r/20241018133446.223516-8-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>