Claude review: drm/doc: Document DRM_WEDGE_RECOVERY_COLD_RESET recovery method

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

Patch Review

Good documentation. The example script is practical and the v6 improvement (looking up the slot via `DEVPATH/slot` symlink instead of scanning all slots) is a real improvement.

Minor nits:

- The script variables (`$DEVICE`, `$DEVPATH`) are unquoted in most uses. PCI paths don't contain spaces so this is fine in practice, but the leading `readlink -f /sys/$1/device` on line 1 should be `readlink -f "/sys/$1/device"` for robustness.

- The `||` fallback in the script is slightly confusing:
```
DEVPATH=$(readlink -f /sys/$1/device 2>/dev/null || readlink -f /sys/$1)
```
If the first `readlink` fails (not a card subdirectory), it falls back to `readlink -f /sys/$1`. This seems intentional but isn't documented.

These are minor — the doc serves its purpose well.

---

---
Generated by Claude Code Patch Reviewer