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>
---

diff -Naurp linux//arch/s390/crypto/sha1_s390.c new//arch/s390/crypto/sha1_s390.c
--- linux//arch/s390/crypto/sha1_s390.c	2009-07-16 05:46:31.000000000 -0400
+++ new//arch/s390/crypto/sha1_s390.c	2009-07-16 05:48:10.000000000 -0400
@@ -59,7 +59,7 @@ static int sha1_export(struct shash_desc
 
 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;
diff -Naurp linux//arch/s390/crypto/sha256_s390.c new//arch/s390/crypto/sha256_s390.c
--- linux//arch/s390/crypto/sha256_s390.c	2009-07-16 05:47:42.000000000 -0400
+++ new//arch/s390/crypto/sha256_s390.c	2009-07-16 05:46:07.000000000 -0400
@@ -55,7 +55,7 @@ static int sha256_export(struct shash_de
 
 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;