drm/msm/dpu: move SSPP allocation to the RM

drm/msm/dpu: move SSPP allocation to the RM

Follow the example of all other hw blocks and initialize SSPP blocks in
Resource Manager.

Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Tested-by: Abhinav Kumar <quic_abhinavk@quicinc.com> # sc7280
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/527313/
Link: https://lore.kernel.org/r/20230316161653.4106395-3-dmitry.baryshkov@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>