crypto: hash - Make crypto_ahash_alg helper available

Move the crypto_ahash_alg helper into include/crypto/internal so
that drivers can use it.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/ahash.c

@@ -31,12 +31,6 @@ struct ahash_request_priv {
 	void *ubuf[] CRYPTO_MINALIGN_ATTR;
 };
 
-static inline struct ahash_alg *crypto_ahash_alg(struct crypto_ahash *hash)
-{
-	return container_of(crypto_hash_alg_common(hash), struct ahash_alg,
-			    halg);
-}
-
 static int hash_walk_next(struct crypto_hash_walk *walk)
 {
 	unsigned int alignmask = walk->alignmask;

include/crypto/internal/hash.h

@@ -149,6 +149,12 @@ static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg)
 			    halg);
 }
 
+static inline struct ahash_alg *crypto_ahash_alg(struct crypto_ahash *hash)
+{
+	return container_of(crypto_hash_alg_common(hash), struct ahash_alg,
+			    halg);
+}
+
 static inline void crypto_ahash_set_statesize(struct crypto_ahash *tfm,
 					      unsigned int size)
 {