mips: switch to generic sigaltstack

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S
index c29ac19..7388e25 100644
--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -233,7 +233,7 @@
 	PTR	compat_sys_rt_sigtimedwait
 	PTR	sys_32_rt_sigqueueinfo
 	PTR	sysn32_rt_sigsuspend
-	PTR	sys32_sigaltstack
+	PTR	compat_sys_sigaltstack
 	PTR	compat_sys_utime		/* 6130 */
 	PTR	sys_mknod
 	PTR	sys_32_personality