[PATCH -next] crypto: brcm - Fix some set-but-not-used warning

[YueHaibing]

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/crypto/bcm/cipher.c: In function 'handle_ahash_req':
drivers/crypto/bcm/cipher.c:720:15: warning:
 variable 'chunk_start' set but not used [-Wunused-but-set-variable]

drivers/crypto/bcm/cipher.c: In function 'spu_rx_callback':
drivers/crypto/bcm/cipher.c:1679:31: warning:
 variable 'areq' set but not used [-Wunused-but-set-variable]

drivers/crypto/bcm/cipher.c:1678:22: warning:
 variable 'ctx' set but not used [-Wunused-but-set-variable]

Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
 drivers/crypto/bcm/cipher.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/crypto/bcm/cipher.c b/drivers/crypto/bcm/cipher.c
index c9393ff..9a66c29 100644
--- a/drivers/crypto/bcm/cipher.c
+++ b/drivers/crypto/bcm/cipher.c
@@ -717,7 +717,7 @@ static int handle_ahash_req(struct iproc_reqctx_s *rctx)
         */
        unsigned int new_data_len;
 
-       unsigned int chunk_start = 0;
+       unsigned int __maybe_unused chunk_start = 0;
        u32 db_size;     /* Length of data field, incl gcm and hash padding */
        int pad_len = 0; /* total pad len, including gcm, hash, stat padding */
        u32 data_pad_len = 0;   /* length of GCM/CCM padding */
@@ -1675,8 +1675,6 @@ static void spu_rx_callback(struct mbox_client *cl, void 
*msg)
        struct spu_hw *spu = &iproc_priv.spu;
        struct brcm_message *mssg = msg;
        struct iproc_reqctx_s *rctx;
-       struct iproc_ctx_s *ctx;
-       struct crypto_async_request *areq;
        int err = 0;
 
        rctx = mssg->ctx;
@@ -1686,8 +1684,6 @@ static void spu_rx_callback(struct mbox_client *cl, void 
*msg)
                err = -EFAULT;
                goto cb_finish;
        }
-       areq = rctx->parent;
-       ctx = rctx->ctx;
 
        /* process the SPU status */
        err = spu->spu_status_process(rctx->msg_buf.rx_stat);