brcmfmac: handle all exceptions as an error.

in brcmf_usb_probe_cb only return code ENOLINK was seen as an
error. This is wrong, all error codes should be returned to usb
subsystem.

Reviewed-by: Arend Van Spriel <arend@broadcom.com>
Signed-off-by: Hante Meuleman <meuleman@broadcom.com>
Signed-off-by: Franky Lin <frankyl@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/brcm80211/brcmfmac/usb.c

@@ -1339,7 +1339,7 @@ static int brcmf_usb_probe_cb(struct brcmf_usbdev_info *devinfo,
 	}
 
 	ret = brcmf_bus_start(dev);
-	if (ret == -ENOLINK) {
+	if (ret) {
 		brcmf_dbg(ERROR, "dongle is not responding\n");
 		brcmf_detach(dev);
 		goto fail;