rt2x00: add txdesc parameter to write_tx_data

Extend the write_tx_data callback with a txdesc parameter to allow
access to the tx desciptor while preparing the tx data.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rt2x00/rt2x00pci.h b/drivers/net/wireless/rt2x00/rt2x00pci.h
index 8149ff6..51bcef3 100644
--- a/drivers/net/wireless/rt2x00/rt2x00pci.h
+++ b/drivers/net/wireless/rt2x00/rt2x00pci.h
@@ -92,7 +92,8 @@
  * This function will initialize the DMA and skb descriptor
  * to prepare the entry for the actual TX operation.
  */
-int rt2x00pci_write_tx_data(struct queue_entry *entry);
+int rt2x00pci_write_tx_data(struct queue_entry *entry,
+			    struct txentry_desc *txdesc);
 
 /**
  * struct queue_entry_priv_pci: Per entry PCI specific information