libertas: move cardspecific data to driver

boot2_version is purely USB specific, so move it to struct if_usb_card.

Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/libertas/if_usb.c b/drivers/net/wireless/libertas/if_usb.c
index 7db8e6c..75aed9d 100644
--- a/drivers/net/wireless/libertas/if_usb.c
+++ b/drivers/net/wireless/libertas/if_usb.c
@@ -104,12 +104,13 @@
 
 static void if_usb_setup_firmware(struct lbs_private *priv)
 {
+	struct if_usb_card *cardp = priv->card;
 	struct cmd_ds_set_boot2_ver b2_cmd;
 	struct cmd_ds_802_11_fw_wake_method wake_method;
 
 	b2_cmd.hdr.size = cpu_to_le16(sizeof(b2_cmd));
 	b2_cmd.action = 0;
-	b2_cmd.version = priv->boot2_version;
+	b2_cmd.version = cardp->boot2_version;
 
 	if (lbs_cmd_with_response(priv, CMD_SET_BOOT2_VER, &b2_cmd))
 		lbs_deb_usb("Setting boot2 version failed\n");
@@ -234,7 +235,7 @@
 	priv->hw_host_to_card = if_usb_host_to_card;
 	priv->hw_get_int_status = if_usb_get_int_status;
 	priv->hw_read_event_cause = if_usb_read_event_cause;
-	priv->boot2_version = udev->descriptor.bcdDevice;
+	cardp->boot2_version = udev->descriptor.bcdDevice;
 
 	if_usb_submit_rx_urb(cardp);