wcn36xx: Remove unnecessary memset

memcpy operation is next to memset code, and the size to copy is equals to the size to
memset, so the memset operation is unnecessary, remove it.
Signed-off-by: NZheng Yongjun <zhengyongjun3@huawei.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20201223012516.24286-1-zhengyongjun3@huawei.com

drivers/net/wireless/ath/wcn36xx/smd.c

@@ -485,7 +485,6 @@ static void init_hal_msg(struct wcn36xx_hal_msg_header *hdr,
 
 #define PREPARE_HAL_PTT_MSG_BUF(send_buf, p_msg_body) \
 	do {							\
-		memset(send_buf, 0, p_msg_body->header.len); \
 		memcpy(send_buf, p_msg_body, p_msg_body->header.len); \
 	} while (0)