rsi: add fix for corruption of auto rate table

Auto rate table sent to firmware is getting corrupted
as memset to zeros is not done. Added memset to skb
data before filling auto rate table.
Signed-off-by: NSanjay Konduri <sanjay.konduri@redpinesignals.com>
Signed-off-by: NSushant Kumar Mishra <sushant.mishra@redpinesignals.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/rsi/rsi_91x_mgmt.c

@@ -1190,6 +1190,7 @@ static int rsi_send_auto_rate_request(struct rsi_common *common,
 		return -ENOMEM;
 	}
 
+	memset(skb->data, 0, frame_len);
 	selected_rates = kzalloc(2 * RSI_TBL_SZ, GFP_KERNEL);
 	if (!selected_rates) {
 		rsi_dbg(ERR_ZONE, "%s: Failed in allocation of mem\n",