arm: switch to generic old sigsuspend

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index caf0ba7..614c497 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -57,6 +57,7 @@
 	select MODULES_USE_ELF_REL
 	select CLONE_BACKWARDS
 	select GENERIC_SIGALTSTACK
+	select OLD_SIGSUSPEND3
 	help
 	  The ARM series is a line of low-power-consumption RISC chip designs
 	  licensed by ARM Ltd and targeted at embedded applications and