mm/numa: Remove duplicated include from mprotect.c

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: linux-mm@kvack.org
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Link: http://lkml.kernel.org/r/1476719259-6214-1-git-send-email-weiyj.lk@gmail.com


Signed-off-by: Thomas Gleixner <tglx@linutronix.de>