mips: switch to generic compat rt_sigaction()

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 5dfeba4..572ab50 100644
--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -117,7 +117,7 @@
 	PTR	sys_mprotect			/* 6010 */
 	PTR	sys_munmap
 	PTR	sys_brk
-	PTR	sys_32_rt_sigaction
+	PTR	compat_sys_rt_sigaction
 	PTR	compat_sys_rt_sigprocmask
 	PTR	compat_sys_ioctl		/* 6015 */
 	PTR	sys_pread64