Add entropy harvest mutex to hard-coded spin lock witness lock order,

remove previous entropy harvesting mutex names as they are no longer
present.  Commit to this file was ommitted when randomdev_soft.c:1.5
was made.

Feet shot:	Robert Huff <roberthuff at rcn dot com>

sys/kern/subr_witness.c

@@ -352,8 +352,7 @@ static struct witness_order_list_entry order_lists[] = {
 	{ "turnstile chain", &lock_class_mtx_spin },
 	{ "td_contested", &lock_class_mtx_spin },
 	{ "callout", &lock_class_mtx_spin },
-	{ "entropy harvest", &lock_class_mtx_spin },
-	{ "entropy harvest buffers", &lock_class_mtx_spin },
+	{ "entropy harvest mutex", &lock_class_mtx_spin },
 	/*
 	 * leaf locks
 	 */