Claude review: drm/bridge: aux: Add drm_aux_bridge_register_from_node()

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

Patch Review

Clean refactoring. The existing `drm_aux_bridge_register()` becomes a thin wrapper.

**Issue (minor): Doc comment on original function was modified incorrectly.** The `@np` parameter was added to the doc comment for `drm_aux_bridge_register()` before the function was renamed:

```c
/**
 * drm_aux_bridge_register - Create a simple bridge device to link the chain
 * @parent: device instance providing this bridge
 * @np: device node pointer corresponding to this bridge instance
```

But the function being documented is now `drm_aux_bridge_register_from_node()`, so this is technically fine, but the description text ("Create a simple bridge device to link the chain") doesn't mention the `np` override behavior. A note in the description about specifying a custom of_node would help.

No functional concerns. Reviewed-by from Neil Armstrong.

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