Claude review: dt-bindings: display: rockchip: analogix-dp: Fix hclk as third clock for RK3588

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

Patch Review

Good approach using per-compatible `allOf`/`if`/`then` blocks to enforce the correct third clock name per SoC. The top-level `clock-names` properly allows both `grf` and `hclk` as the third entry:

```yaml
      - enum:
          - grf
          - hclk
```

Then individual compatible constraints lock each SoC to the correct name. The RK3288 constraint correctly sets `maxItems: 2` to prevent a third clock. RK3399 mandates `grf`, RK3588 mandates `hclk`. Well done.

The Fixes tag is appropriate since the original RK3588 binding didn't enforce the correct clock name.

No issues.

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