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/drivers/tty/rocket.c b/drivers/tty/rocket.c
index 13043e8..6a1241c 100644
--- a/drivers/tty/rocket.c
+++ b/drivers/tty/rocket.c
@@ -83,7 +83,7 @@
 #include <linux/wait.h>
 #include <linux/pci.h>
 #include <linux/uaccess.h>
-#include <asm/atomic.h>
+#include <linux/atomic.h>
 #include <asm/unaligned.h>
 #include <linux/bitops.h>
 #include <linux/spinlock.h>