Implement 32-bit compatibility for waitid(2).

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/kernel/scall64-n32.S

@@ -358,7 +358,7 @@ EXPORT(sysn32_call_table)
 	PTR	compat_sys_mq_notify
 	PTR	compat_sys_mq_getsetattr
 	PTR	sys_ni_syscall			/* 6240, sys_vserver */
-	PTR	sys_waitid
+	PTR	sysn32_waitid
 	PTR	sys_ni_syscall			/* available, was setaltroot */
 	PTR	sys_add_key
 	PTR	sys_request_key