MIPS: Set positive error number to errno on illegal_syscall

Signed-off-by: NAtsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/kernel/scall32-o32.S

@@ -180,7 +180,7 @@ bad_stack:
 	 * The system call does not exist in this kernel
 	 */
 illegal_syscall:
-	li	v0, -ENOSYS			# error
+	li	v0, ENOSYS			# error
 	sw	v0, PT_R2(sp)
 	li	t0, 1				# set error flag
 	sw	t0, PT_R7(sp)

arch/mips/kernel/scall64-64.S

@@ -117,7 +117,7 @@ syscall_trace_entry:
 
 illegal_syscall:
 	/* This also isn't a 64-bit syscall, throw an error.  */
-	li	v0, -ENOSYS			# error
+	li	v0, ENOSYS			# error
 	sd	v0, PT_R2(sp)
 	li	t0, 1				# set error flag
 	sd	t0, PT_R7(sp)