Claude review: drm/nouveau/fifo/nv04: filter benign CACHE_ERROR from Mesa NV50 bind probe

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

Patch Review

**Assessment: Good — minor nits only.**

The filter is narrowly scoped and well-explained. It checks for the exact Mesa NV50 bind probe signature (method 0x0060, data 0xbeef02xx) and demotes only that case to debug level.

**Positive:** By placing the filter *before* the `else` branch that patch 2 hooks into, benign probes correctly don't count toward the Tier-2 wedge window. This is the right ordering.

**Nit 1 — debug message omits channel name.** The error path prints `chan->name` but the debug path does not:

```c
nvkm_debug(subdev, "CACHE_ERROR - ch %d subc %d mthd %04x data %08x (benign, skipped)\n",
           chid, (mthd >> 13) & 7, mthd & 0x1ffc, data);
```

This is fine for a debug-level message, but for consistency with the error message format (`ch %d [%s]`), consider including the channel name. Very minor.

**Nit 2 — comment length.** The 5-line comment block is somewhat verbose for a simple filter. The kernel style generally prefers shorter inline comments. Not a blocker.

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