rcu/kvfree: Adjust a shrinker name

Rename "rcu-kfree" to "slab-kvfree-rcu" since it goes to the
slab_common.c file soon.

Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Acked-by: Hyeonggon Yoo <hyeonggon.yoo@sk.com>
Tested-by: Hyeonggon Yoo <hyeonggon.yoo@sk.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>

Author: urezki

kernel/rcu/tree.c

@@ -5689,7 +5689,7 @@ void __init kvfree_rcu_init(void)
 		krcp->initialized = true;
 	}
 
-	kfree_rcu_shrinker = shrinker_alloc(0, "rcu-kfree");
+	kfree_rcu_shrinker = shrinker_alloc(0, "slab-kvfree-rcu");
 	if (!kfree_rcu_shrinker) {
 		pr_err("Failed to allocate kfree_rcu() shrinker!\n");
 		return;