sh: switch to generic old sigaction()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index d69caaf..b5fd9f3 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -42,6 +42,7 @@
 	select MODULES_USE_ELF_RELA
 	select GENERIC_SIGALTSTACK
 	select OLD_SIGSUSPEND
+	select OLD_SIGACTION
 	help
 	  The SuperH is a RISC processor targeted for use in embedded systems
 	  and consumer electronics; it was also used in the Sega Dreamcast