Claude review: arm64: dts: ti: add GPU node

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Patch Review

**Author:** Michael Walle (carried by Antonios Christidis)

Adds the BXS-4 GPU node for J722S/AM62P in the shared common-main dtsi.

**Vague subject line:** `"arm64: dts: ti: add GPU node"` doesn't specify which SoC. It should be something like `"arm64: dts: ti: k3-am62p-j722s: Add GPU node"` to match the convention of the other patches in this series.

```dts
gpu: gpu@fd80000 {
    compatible = "ti,am62p-gpu", "img,img-bxs-4-64", "img,img-rogue";
    reg = <0x00 0x0fd80000 0x00 0x80000>;
    clocks = <&k3_clks 237 3>;
    clock-names = "core";
    interrupts = <GIC_SPI 241 IRQ_TYPE_LEVEL_HIGH>;
    power-domains = <&k3_pds 237 TI_SCI_PD_EXCLUSIVE>,
            <&k3_pds 242 TI_SCI_PD_EXCLUSIVE>;
    power-domain-names = "a", "b";
};
```

**Inconsistencies compared to patches 1 and 3:**

1. **Missing `assigned-clocks` / `assigned-clock-rates`**: Patches 1 and 3 both set these to configure the GPU clock rate. If the AM62P/J722S GPU needs a specific clock rate to function, these should be added. If the default is acceptable, the cover letter or commit message should explain why this node differs.

2. **Missing `dma-coherent`**: Patches 1 and 3 include `dma-coherent`. If AM62P/J722S doesn't support hardware-managed cache coherency for the GPU, this omission is correct, but it should be documented in the commit message.

These differences are likely hardware-specific and intentional, but they should be explicitly noted.

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