media: iris: Constify iris_v4l2_file_ops

media: iris: Constify iris_v4l2_file_ops

The iris_v4l2_file_ops structure is never modified. Make it const.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Dikshita Agarwal <dikshita.agarwal@oss.qualcomm.com>
Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
[bod: drop qcom from patch title for consistency with other patches]
Signed-off-by: Bryan O'Donoghue <bod@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>