alpha: atomic_add_return() should return int

Prevents stuff like

drivers/crypto/hifn_795x.c:2443: warning: format '%d' expects type 'int', but argument 4 has type 'long int'
drivers/crypto/hifn_795x.c:2443: warning: format '%d' expects type 'int', but argument 4 has type 'long int'

(at least).

Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/asm-alpha/atomic.h

@@ -100,7 +100,7 @@ static __inline__ void atomic64_sub(long i, atomic64_t * v)
 /*
  * Same as above, but return the result value
  */
-static __inline__ long atomic_add_return(int i, atomic_t * v)
+static inline int atomic_add_return(int i, atomic_t *v)
 {
 	long temp, result;
 	smp_mb();