Claude review: drm/msm: dp: handle the IRQ_HPD events reported by USB-C

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

Patch Review

```c
+	if (extra_status == DRM_CONNECTOR_DP_IRQ_HPD)
+		msm_dp_add_event(dp, EV_IRQ_HPD_INT, 0, 0);
```

This is the actual consumer — a 3-line addition. The event fires the same `EV_IRQ_HPD_INT` as the hardware IRQ path, which is correct.

**Potential issue: duplicate events when HPD + IRQ_HPD arrive together.**

The code now does:
```c
	if (!msm_dp_display->link_ready && status == connector_status_connected)
		msm_dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0);
	else if (msm_dp_display->link_ready && status == connector_status_disconnected)
		msm_dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);

	if (extra_status == DRM_CONNECTOR_DP_IRQ_HPD)
		msm_dp_add_event(dp, EV_IRQ_HPD_INT, 0, 0);
```

When a USB-C DP connection is first established with an IRQ_HPD pending, both `EV_HPD_PLUG_INT` and `EV_IRQ_HPD_INT` will be queued. This matches the hardware behavior (the HW IRQ handler does the same thing — plug and IRQ events are independently checked). So this looks correct.

**No issues.**

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Generated by Claude Code Patch Reviewer