remove unnecessary void* type casting.

Signed-off-by: Dong Chuanjian <chuanjian@nfschina.com>

diff --git a/drivers/media/common/siano/smsendian.c b/drivers/media/common/siano/smsendian.c
index 8cb8853a1edb..a3573814919b 100644
--- a/drivers/media/common/siano/smsendian.c
+++ b/drivers/media/common/siano/smsendian.c
@@ -17,7 +17,7 @@
 void smsendian_handle_tx_message(void *buffer)
 {
 #ifdef __BIG_ENDIAN
-	struct sms_msg_data *msg = (struct sms_msg_data *)buffer;
+	struct sms_msg_data *msg = buffer;
 	int i;
 	int msg_words;
 
-- 
2.18.2