crypto: s390 - Fix sha build failure

Use struct s390_sha_ctx instead of sha1/sha256_state struct to fix
s390 crypto build break.
Signed-off-by: Sachin Sant <sachinp@in.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

arch/s390/crypto/sha1_s390.c

@@ -59,7 +59,7 @@ static int sha1_export(struct shash_desc *desc, void *out)
 
 static int sha1_import(struct shash_desc *desc, const u8 *in)
 {
-	struct sha1_state *sctx = shash_desc_ctx(desc);
+	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
 	struct sha1_state *ictx = in;
 
 	sctx->count = ictx->count;

arch/s390/crypto/sha256_s390.c

@@ -55,7 +55,7 @@ static int sha256_export(struct shash_desc *desc, void *out)
 
 static int sha256_import(struct shash_desc *desc, const u8 *in)
 {
-	struct sha256_state *sctx = shash_desc_ctx(desc);
+	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
 	struct sha256_state *ictx = in;
 
 	sctx->count = ictx->count;