Claude review: drm/msm/dp: clear EDID on display unplug

[Claude Code Review Bot <claude-review@example.com>]

Patch Review

Adds `msm_dp_panel_unplugged()` to clear the EDID on display unplug, correctly guarded by `!is_edp`.

```c
+void msm_dp_panel_unplugged(struct msm_dp_panel *msm_dp_panel,
+			    struct drm_connector *connector)
+{
+	drm_edid_connector_update(connector, NULL);
+	drm_edid_free(msm_dp_panel->drm_edid);
+	msm_dp_panel->drm_edid = NULL;
+}
```

**No issues.** Clean and correct.

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**Summary of items requiring attention:**
1. **Patch 9 (get_modes):** Logic bug - "No sink connected" printed on success path
2. **Patch 9 (detect):** PM refcount leak when device is plugged
3. **Patch 9 (plug_handle):** Missing early-out for already-plugged state
4. **Patch 7 (IRQ thread):** REPLUG interrupt potentially unhandled in internal HPD path
5. **Patch 4:** C++ style comment
6. **Patch 3:** Redundant variable assignment
7. **Patch 9:** Two typos in comments/kerneldoc

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Generated by Claude Code Patch Reviewer