Claude review: dt-bindings: soc: imx93-media-blk-ctrl: Add PDFC subnode to schema and example

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

Patch Review

**Subject:** `[PATCH v10 1/3] dt-bindings: soc: imx93-media-blk-ctrl: Add PDFC subnode to schema and example`

This patch adds the `dpi-bridge` subnode binding to the existing `fsl,imx93-media-blk-ctrl.yaml`. Looks reasonable.

**Minor observations:**

1. The binding only lists `nxp,imx91-pdfc` and `nxp,imx93-pdfc` in the compatible enum, but the driver in patch 2 only has a match for `nxp,imx93-pdfc`. If `nxp,imx91-pdfc` is a distinct compatible in the binding, the driver should also match it (or document a fallback). See patch 2 comments.

2. The `bus-width` enum is well-documented:
```yaml
                  bus-width:
                    enum: [ 16, 18, 24 ]
```
But the driver only acts on `bus-width == 18` (truncating LSBs). A `bus-width` of 16 at the physical level isn't handled differently in the driver. This is okay if `bus-width: 16` is only informational, but worth confirming intent.

3. No issues with the example node addition - it properly demonstrates `bus-width = <18>` in the output endpoint.

**Verdict:** Looks good. Already has Rob's Reviewed-by.

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