media: platform: qcom/iris: add power_off_controller to vpu_ops

media: platform: qcom/iris: add power_off_controller to vpu_ops

In order to support the SM8650 iris33 hardware, we need to provide a
specific constoller power off sequences via the vpu_ops callbacks.

Add the callback, and use the current helper for currently supported
platforms.

Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Reviewed-by: Dikshita Agarwal <quic_dikshita@quicinc.com>
Tested-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org> # x1e Dell
Reviewed-by: Vikash Garodia <quic_vgarodia@quicinc.com>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Bryan O'Donoghue <bod@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>