rt2x00: Unconstify rt2x00dev

Some register accesses need rt2x00dev to be non-const
they all need modifying so the prototype is consistent.

Signed-off-by: Adam Baker <linux@baker-net.org.uk>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/wireless/rt2x00/rt2x00usb.c b/drivers/net/wireless/rt2x00/rt2x00usb.c
index 568d738..d16f0a7 100644
--- a/drivers/net/wireless/rt2x00/rt2x00usb.c
+++ b/drivers/net/wireless/rt2x00/rt2x00usb.c
@@ -38,7 +38,7 @@
 /*
  * Interfacing with the HW.
  */
-int rt2x00usb_vendor_request(const struct rt2x00_dev *rt2x00dev,
+int rt2x00usb_vendor_request(struct rt2x00_dev *rt2x00dev,
 			     const u8 request, const u8 requesttype,
 			     const u16 offset, const u16 value,
 			     void *buffer, const u16 buffer_length,
@@ -76,7 +76,7 @@
 }
 EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request);
 
-int rt2x00usb_vendor_request_buff(const struct rt2x00_dev *rt2x00dev,
+int rt2x00usb_vendor_request_buff(struct rt2x00_dev *rt2x00dev,
 				  const u8 request, const u8 requesttype,
 				  const u16 offset, void *buffer,
 				  const u16 buffer_length, const int timeout)