rndis_wlan: simplify is_associated()

It is not necessary to define the variable ret to receive
the return value of the get_bssid() method.
Signed-off-by: zuoqilin <zuoqilin@yulong.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210423094940.1593-1-zuoqilin1@163.com

drivers/net/wireless/rndis_wlan.c

@@ -1036,14 +1036,11 @@ static bool is_associated(struct usbnet *usbdev)
 {
 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
 	u8 bssid[ETH_ALEN];
-	int ret;
 
 	if (!priv->radio_on)
 		return false;
 
-	ret = get_bssid(usbdev, bssid);
-
-	return (ret == 0 && !is_zero_ether_addr(bssid));
+	return (get_bssid(usbdev, bssid) == 0 && !is_zero_ether_addr(bssid));
 }
 
 static int disassociate(struct usbnet *usbdev, bool reset_ssid)