media: iris: vpu3x: Add MNoC low power handshake during hardware power-off

media: iris: vpu3x: Add MNoC low power handshake during hardware power-off

Add the missing write to AON_WRAPPER_MVP_NOC_LPI_CONTROL before
reading the LPI status register. Introduce a handshake loop to ensure
MNoC enters low power mode reliably during VPU3 hardware power-off with
timeout handling.

Fixes: 02083a1e00ae ("media: platform: qcom/iris: add support for vpu33")
Cc: stable@vger.kernel.org
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8650-QRD
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8650-HDK
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Dikshita Agarwal <quic_dikshita@quicinc.com>
Signed-off-by: Bryan O'Donoghue <bod@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>