Claude review: arm64: dts: ti: k3-j784s4: Add GPU node

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Patch Review

**Author:** Antonios Christidis

Adds the BXS-464 GPU node for the J784S4 SoC.

```dts
gpu: gpu@4e20000000 {
    compatible = "ti,j721s2-gpu", "img,img-bxs-4-64", "img,img-rogue";
    reg = <0x4e 0x20000000 0x00 0x80000>;
    clocks = <&k3_clks 181 1>;
    clock-names = "core";
    assigned-clocks = <&k3_clks 181 1>;
    assigned-clock-rates = <800000000>;
    interrupts = <GIC_SPI 24 IRQ_TYPE_LEVEL_HIGH>;
    power-domains = <&k3_pds 181 TI_SCI_PD_EXCLUSIVE>,
        <&k3_pds 182 TI_SCI_PD_EXCLUSIVE>;
    power-domain-names = "a", "b";
    dma-coherent;
};
```

- Uses `"ti,j721s2-gpu"` as the SoC-specific compatible -- this reuses the existing J721S2 compatible rather than introducing a new J784S4-specific one. This makes sense if the J784S4 GPU block is identical to J721S2's, but the cover letter and commit message should explain this choice.
- **No new dt-binding needed** since `ti,j721s2-gpu` already exists in the binding, which is consistent.
- **Indentation inconsistency** in `power-domains`: uses a single tab indent for the continuation line, while patch 1 uses a double tab. This is minor but worth keeping consistent across the series:

  Patch 1:
  ```
  power-domains = <&k3_pds 125 TI_SCI_PD_EXCLUSIVE>,
  		<&k3_pds 126 TI_SCI_PD_EXCLUSIVE>;
  ```
  Patch 3:
  ```
  power-domains = <&k3_pds 181 TI_SCI_PD_EXCLUSIVE>,
  	<&k3_pds 182 TI_SCI_PD_EXCLUSIVE>;
  ```

- Same `status = "disabled"` question as patch 1.
- The commit message says "Add the Series BXS GPU node" -- "Series" should probably be lowercase or the whole identifier should be quoted/clarified (e.g., "BXS-464").

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