crypto: sahara - remove unneeded mutex in the exported state

As pointed out by Herbert Xu we should not include the mutex in the
exported state, so let's just get rid of it.
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/sahara.c

@@ -182,7 +182,6 @@ struct sahara_sha_reqctx {
 	u8			buf[SAHARA_MAX_SHA_BLOCK_SIZE];
 	u8			rembuf[SAHARA_MAX_SHA_BLOCK_SIZE];
 	u8			context[SHA256_DIGEST_SIZE + 4];
-	struct mutex		mutex;
 	unsigned int		mode;
 	unsigned int		digest_size;
 	unsigned int		context_size;
@@ -1096,7 +1095,6 @@ static int sahara_sha_enqueue(struct ahash_request *req, int last)
 	if (!req->nbytes && !last)
 		return 0;
 
-	mutex_lock(&rctx->mutex);
 	rctx->last = last;
 
 	if (!rctx->active) {
@@ -1109,7 +1107,6 @@ static int sahara_sha_enqueue(struct ahash_request *req, int last)
 	mutex_unlock(&dev->queue_mutex);
 
 	wake_up_process(dev->kthread);
-	mutex_unlock(&rctx->mutex);
 
 	return ret;
 }
@@ -1137,8 +1134,6 @@ static int sahara_sha_init(struct ahash_request *req)
 	rctx->context_size = rctx->digest_size + 4;
 	rctx->active = 0;
 
-	mutex_init(&rctx->mutex);
-
 	return 0;
 }