drm/msm/dpu: drop DPU_PLANE_QOS_PANIC_CTRL

This flag is always passed to _dpu_plane_set_qos_ctrl(), so drop it and
remove corresponding conditions from the mentioned function.

Reviewed-by: Jeykumar Sankaran <quic_jeykumar@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/537916/
Link: https://lore.kernel.org/r/20230518222238.3815293-8-dmitry.baryshkov@linaro.org


Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>