Implement 32-bit compatibility for waitid(2).

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index 271b2cb..00e0d2b 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -480,7 +480,7 @@
 	PTR	compat_sys_mq_notify		/* 4275 */
 	PTR	compat_sys_mq_getsetattr
 	PTR	sys_ni_syscall			/* sys_vserver */
-	PTR	sys_waitid
+	PTR	sys32_waitid
 	PTR	sys_ni_syscall			/* available, was setaltroot */
 	PTR	sys_add_key			/* 4280 */
 	PTR	sys_request_key