Claude review: ttm/pool: Don't leak LRU list on shutdown

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

Patch Review

**Correctness: Good.** The added `list_lru_destroy(&pt->pages)` is placed after the LRU walk and dispose, which is the right ordering — all entries are drained first, then the LRU infrastructure is freed. This mirrors the standard `list_lru_init` / `list_lru_destroy` lifecycle used throughout the kernel.

**Placement within `ttm_pool_type_fini`:**

```c
list_lru_walk(&pt->pages, pool_move_to_dispose_list, &dispose, LONG_MAX);
ttm_pool_dispose_list(pt, &dispose);
list_lru_destroy(&pt->pages);
```

The destroy comes after draining, which is correct. Calling `list_lru_destroy` on a non-empty LRU would be a bug, but the walk + dispose above guarantee it's empty.

**Commit message:** Clear and concise. The `Fixes:` tag correctly references the commit that introduced the `list_lru` conversion. The description of how it was found (kmemleak + igt hotunplug) is helpful for reviewers.

**No issues found.** This is a clean, correct one-line fix.

Reviewed-by assessment: **Accept.** No changes needed.

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