Claude review: drm: Add DRM_WEDGE_RECOVERY_COLD_RESET recovery method

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

Patch Review

```c
+#define DRM_WEDGE_RECOVERY_COLD_RESET	BIT(4)	/* full device cold reset */
```

and:

```c
+	case DRM_WEDGE_RECOVERY_COLD_RESET:
+		return "cold-reset";
```

This is clean and straightforward. One question: the existing recovery methods are ordered from least to most side-effects (NONE < REBIND < BUS_RESET < VENDOR). Where does COLD_RESET fit relative to VENDOR? BIT(4) is after VENDOR (BIT(3)), which implies it's more severe, but the documentation in patch 3 should clarify whether `cold-reset` can be combined with other methods in a bitmask (like REBIND|BUS_RESET is used as the default). A cold-reset is strictly more drastic than a bus-reset, so it should be documented whether userspace should try bus-reset first if both are set.

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Generated by Claude Code Patch Reviewer