includecheck fix: s390, sys_s390.c

fix the following 'make includecheck' warning:

arch/s390/kernel/sys_s390.c: linux/syscalls.h is included more than once.

Signed-off-by: Jaswinder Singh Rajput <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Cc: Sam Ravnborg <[e-mail]>
LKML-Reference: <[e-mail]>

arch/s390/kernel/sys_s390.c

···
 #include <linux/personality.h>
 #include <linux/unistd.h>
 #include <linux/ipc.h>
-#include <linux/syscalls.h>
 #include <asm/uaccess.h>
 #include "entry.h"