Revert back to %service_del_postun -n for distros older

than factory

OBS-URL: https://build.opensuse.org/package/show/Base:System/multipath-tools?expand=0&rev=219

multipath-tools.spec

@@ -200,7 +200,11 @@ exit 0
 %postun
 %{?regenerate_initrd_post}
 %service_del_postun multipathd.service
+%if 0%{?suse_version} >= 1550
 %service_del_postun_without_restart multipathd.socket
+%else
+%service_del_postun -n multipathd.socket
+%endif
 
 %posttrans
 %{?regenerate_initrd_posttrans}