mwifiex: remove an unneede NULL check in mwifiex_init_adapter()

"adapter->sleep_cfm" is always non-NULL at this point.  Static checkers
complain that we already dereference it at the start of the function
when we do:

	skb_put(adapter->sleep_cfm, sizeof(struct mwifiex_opt_sleep_confirm));
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/mwifiex/init.c

@@ -266,18 +266,15 @@ static void mwifiex_init_adapter(struct mwifiex_adapter *adapter)
 
 	mwifiex_wmm_init(adapter);
 
-	if (adapter->sleep_cfm) {
-		sleep_cfm_buf = (struct mwifiex_opt_sleep_confirm *)
-						adapter->sleep_cfm->data;
-		memset(sleep_cfm_buf, 0, adapter->sleep_cfm->len);
-		sleep_cfm_buf->command =
-				cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
-		sleep_cfm_buf->size =
-				cpu_to_le16(adapter->sleep_cfm->len);
-		sleep_cfm_buf->result = 0;
-		sleep_cfm_buf->action = cpu_to_le16(SLEEP_CONFIRM);
-		sleep_cfm_buf->resp_ctrl = cpu_to_le16(RESP_NEEDED);
-	}
+	sleep_cfm_buf = (struct mwifiex_opt_sleep_confirm *)
+					adapter->sleep_cfm->data;
+	memset(sleep_cfm_buf, 0, adapter->sleep_cfm->len);
+	sleep_cfm_buf->command = cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
+	sleep_cfm_buf->size = cpu_to_le16(adapter->sleep_cfm->len);
+	sleep_cfm_buf->result = 0;
+	sleep_cfm_buf->action = cpu_to_le16(SLEEP_CONFIRM);
+	sleep_cfm_buf->resp_ctrl = cpu_to_le16(RESP_NEEDED);
+
 	memset(&adapter->sleep_params, 0, sizeof(adapter->sleep_params));
 	memset(&adapter->sleep_period, 0, sizeof(adapter->sleep_period));
 	adapter->tx_lock_flag = false;