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/include/linux/spinlock.h b/include/linux/spinlock.h
index 0b22d51..7df6c17 100644
--- a/include/linux/spinlock.h
+++ b/include/linux/spinlock.h
@@ -384,7 +384,7 @@
  * Pull the atomic_t declaration:
  * (asm-mips/atomic.h needs above definitions)
  */
-#include <asm/atomic.h>
+#include <linux/atomic.h>
 /**
  * atomic_dec_and_lock - lock on reaching reference count zero
  * @atomic: the atomic counter