rt2x00: Fix skbdesc->data_len initialization

skbdesc->data_len was not initialized correctly
in rt2x00pci, rt2x00usb, rt2500usb and rt73usb.

The value was set to queue->data_size which
means that the incorrect frame size was pased
to the upper layers.

Correctly base the value on either the skb->len,
or the rx frame size passed to the driver by the
device.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rt2x00/rt73usb.c b/drivers/net/wireless/rt2x00/rt73usb.c
index d2096d2..5f3f74c 100644
--- a/drivers/net/wireless/rt2x00/rt73usb.c
+++ b/drivers/net/wireless/rt2x00/rt73usb.c
@@ -1399,7 +1399,7 @@
 	 * Set descriptor and data pointer.
 	 */
 	skbdesc->data = entry->skb->data + entry->queue->desc_size;
-	skbdesc->data_len = entry->queue->data_size;
+	skbdesc->data_len = rxdesc->size;
 	skbdesc->desc = entry->skb->data;
 	skbdesc->desc_len = entry->queue->desc_size;