lldp: fix lldp_neighbor_equal() to compare lists of variants

Fixes: 6c52d946 ('lldp: add support for management address TLV')
(cherry picked from commit 7c0d73d9)

src/devices/nm-lldp-listener.c

@@ -387,6 +387,19 @@ lldp_neighbor_equal (LldpNeighbor *a, LldpNeighbor *b)
 			if (!nm_streq (a->attrs[attr_id].v_string, b->attrs[attr_id].v_string))
 				return FALSE;
 			break;
+		case LLDP_ATTR_TYPE_ARRAY_OF_VARDICTS: {
+			NMCListElem *itr_a, *itr_b;
+
+			if (c_list_length (&a->attrs[attr_id].v_variant_list) != c_list_length (&b->attrs[attr_id].v_variant_list))
+				return FALSE;
+			itr_b = c_list_first_entry (&b->attrs[attr_id].v_variant_list, NMCListElem, lst);
+			c_list_for_each_entry (itr_a, &a->attrs[attr_id].v_variant_list, lst) {
+				if (!g_variant_equal (itr_a->data, itr_b->data))
+					return FALSE;
+				itr_b = c_list_entry (&itr_b->lst, NMCListElem, lst);
+			}
+			break;
+		}
 		default:
 			nm_assert (a->attrs[attr_id].attr_type == LLDP_ATTR_TYPE_NONE);
 			break;