MIPS: Set ENOSYS to errno on illegal system call number for syscall(2)

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/kernel/scall32-o32.S b/arch/mips/kernel/scall32-o32.S
index ffa23bd..759f680 100644
--- a/arch/mips/kernel/scall32-o32.S
+++ b/arch/mips/kernel/scall32-o32.S
@@ -293,7 +293,7 @@
 	jr	t2
 	/* Unreached */
 
-einval:	li	v0, -EINVAL
+einval:	li	v0, -ENOSYS
 	jr	ra
 	END(sys_syscall)