atomic: use <linux/atomic.h>

This allows us to move duplicated code in <asm/atomic.h>
(atomic_inc_not_zero() for now) to <linux/atomic.h>

Signed-off-by: Arun Sharma <asharma@fb.com>
Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: David Miller <davem@davemloft.net>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/security/selinux/xfrm.c b/security/selinux/xfrm.c
index 68178b7..48665ec 100644
--- a/security/selinux/xfrm.c
+++ b/security/selinux/xfrm.c
@@ -46,7 +46,7 @@
 #include <net/xfrm.h>
 #include <net/checksum.h>
 #include <net/udp.h>
-#include <asm/atomic.h>
+#include <linux/atomic.h>
 
 #include "avc.h"
 #include "objsec.h"