crypto: s390 - Rename functions to avoid conflict with crypto/sha256.h

Rename static / file-local functions so that they do not conflict with
the functions declared in crypto/sha256.h.

This is a preparation patch for folding crypto/sha256.h into crypto/sha.h.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

arch/s390/crypto/sha256_s390.c

@@ -17,7 +17,7 @@
 
 #include "sha.h"
 
-static int sha256_init(struct shash_desc *desc)
+static int s390_sha256_init(struct shash_desc *desc)
 {
 	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
 
@@ -60,7 +60,7 @@ static int sha256_import(struct shash_desc *desc, const void *in)
 
 static struct shash_alg sha256_alg = {
 	.digestsize	=	SHA256_DIGEST_SIZE,
-	.init		=	sha256_init,
+	.init		=	s390_sha256_init,
 	.update		=	s390_sha_update,
 	.final		=	s390_sha_final,
 	.export		=	sha256_export,
@@ -76,7 +76,7 @@ static struct shash_alg sha256_alg = {
 	}
 };
 
-static int sha224_init(struct shash_desc *desc)
+static int s390_sha224_init(struct shash_desc *desc)
 {
 	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
 
@@ -96,7 +96,7 @@ static int sha224_init(struct shash_desc *desc)
 
 static struct shash_alg sha224_alg = {
 	.digestsize	=	SHA224_DIGEST_SIZE,
-	.init		=	sha224_init,
+	.init		=	s390_sha224_init,
 	.update		=	s390_sha_update,
 	.final		=	s390_sha_final,
 	.export		=	sha256_export,