Claude review: drm: bridge: dw_hdmi: Call poweron/poweroff from atomic enable/disable

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

Patch Review

**Status:** Clean simplification.

Removes `bridge_is_on`, `dw_hdmi_update_power()`, and the power management from `dw_hdmi_setup_rx_sense()` and `dw_hdmi_connector_force()`. The commit message correctly explains that `drm_helper_hpd_irq_event()` already handles enable/disable based on connection status.

The direct calls:
```c
-	dw_hdmi_update_power(hdmi);
+	dw_hdmi_poweroff(hdmi);
```
and
```c
-	dw_hdmi_update_power(hdmi);
+	dw_hdmi_poweron(hdmi);
```
are straightforward since the old `dw_hdmi_update_power()` just checked `disabled`/`force`/`rxsense` state that is already guaranteed by the atomic enable/disable call context.

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Generated by Claude Code Patch Reviewer