mm/mremap.c: use linux headers

"WARNING: Use #include <linux/uaccess.h> instead of <asm/uaccess.h>"
Signed-off-by: Paul McQuade <paulmcquad@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/mremap.c

@@ -21,8 +21,8 @@
 #include <linux/syscalls.h>
 #include <linux/mmu_notifier.h>
 #include <linux/sched/sysctl.h>
+#include <linux/uaccess.h>
 
-#include <asm/uaccess.h>
 #include <asm/cacheflush.h>
 #include <asm/tlbflush.h>