powerpc: switch to generic old sigaction()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index bec7808..ec89a7b 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -150,6 +150,7 @@
 	select GENERIC_COMPAT_RT_SIGPROCMASK
 	select GENERIC_COMPAT_RT_SIGPENDING
 	select OLD_SIGSUSPEND
+	select OLD_SIGACTION if PPC32
 
 config EARLY_PRINTK
 	bool
@@ -160,6 +161,7 @@
 	default y if PPC64
 	select COMPAT_BINFMT_ELF
 	select ARCH_WANT_OLD_COMPAT_IPC
+	select COMPAT_OLD_SIGACTION
 
 config SYSVIPC_COMPAT
 	bool