Fix assertion in Persistent L2ARC

At the end of l2arc_evict() fix an assertion in the case that l2ad_hand
+ distance == l2ad_end.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: George Amanakis <gamanakis@gmail.com>
Closes openzfs#16202
Closes openzfs#16207

module/zfs/arc.c

@@ -8890,7 +8890,7 @@ l2arc_evict(l2arc_dev_t *dev, uint64_t distance, boolean_t all)
 		 * assertions may be violated without functional consequences
 		 * as the device is about to be removed.
 		 */
-		ASSERT3U(dev->l2ad_hand + distance, <, dev->l2ad_end);
+		ASSERT3U(dev->l2ad_hand + distance, <=, dev->l2ad_end);
 		if (!dev->l2ad_first)
 			ASSERT3U(dev->l2ad_hand, <=, dev->l2ad_evict);
 	}