drm/msm: add support for SM8550

This adds support for the MDSS/DPU/DSI on the Qualcomm SM8550 platform.

This patchset is based on the SM8450 display support serie at [1].

In order to work, the following patchsets are required:
- PM8550 LDO fix at [2]
- DISPCC driver at [3]

+ the DT changes.

[1] https://lore.kernel.org/all/20221207012231.112059-1-dmitry.baryshkov@linaro.org/
[2] https://lore.kernel.org/all/20230102-topic-sm8550-upstream-fixes-reg-l11b-nldo-v1-1-d97def246338@linaro.org/
[3] https://lore.kernel.org/all/20230103-topic-sm8550-upstream-dispcc-v1-0-81bfcc26b2dc@linaro.org/



To: Rob Clark <robdclark@gmail.com>
To: Abhinav Kumar <quic_abhinavk@quicinc.com>
To: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
To: Sean Paul <sean@poorly.run>
To: David Airlie <airlied@gmail.com>
To: Daniel Vetter <daniel@ffwll.ch>
To: Rob Herring <robh+dt@kernel.org>
To: Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>
To: Jonathan Marek <jonathan@marek.ca>
Cc: linux-arm-msm@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: freedreno@lists.freedesktop.org
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>

---
Changes in v2:
- EDITME: describe what is new in this series revision.
- EDITME: use bulletpoints and terse descriptions.
- Link to v1: https://lore.kernel.org/r/20230103-topic-sm8550-upstream-mdss-dsi-v1-0-9ccd7e652fcd@linaro.org

--- b4-submit-tracking ---
# This section is used internally by b4 prep for tracking purposes.
{
  "series": {
    "revision": 2,
    "change-id": "20230103-topic-sm8550-upstream-mdss-dsi-35ca8acea529",
    "base-branch": null,
    "prefixes": [],
    "history": {
      "v1": [
        "20230103-topic-sm8550-upstream-mdss-dsi-v1-0-9ccd7e652fcd@linaro.org"
      ]
    }
  }
}