Claude review: drm/doc: Document DRM_WEDGE_RECOVERY_COLD_RESET recovery method

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

Patch Review

**Recovery script is incomplete:**

```sh
    else
	echo "No slot found"
    fi
```

When no PCI slot is found for power-cycling, the script just prints "No slot found" and exits with success. For a recovery example, this is misleading — the user has no recovery path. At minimum it should suggest IPMI/BMC power cycling or exit with a non-zero status.

**Udev rule quoting:**

```
SUBSYSTEM=="drm", ENV{WEDGED}=="cold-reset", DEVPATH=="*/drm/card[0-9]",
RUN+="/path/to/cold-reset.sh $env{DEVPATH}"
```

The DEVPATH glob `card[0-9]` only matches single-digit card numbers. For consistency with other examples in the doc, or for systems with 10+ GPUs, use `card[0-9]*`.

**Cold Reset Recovery section placement:**

The "Cold Reset Recovery" section is placed before "Vendor Specific Recovery" in the document, but BIT(4) comes after BIT(3). Consider placing it after the vendor-specific section to match the severity ordering, or explicitly document the ordering.

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