s390: switch to generic old sigsuspend

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 0193647..17ba4f3 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -144,6 +144,7 @@
 	select GENERIC_COMPAT_RT_SIGQUEUEINFO
 	select GENERIC_COMPAT_RT_SIGPROCMASK
 	select GENERIC_COMPAT_RT_SIGPENDING
+	select OLD_SIGSUSPEND3
 
 config SCHED_OMIT_FRAME_POINTER
 	def_bool y