rt2x00: Revert "rt2x00: remove unused argument"

This reverts commit db36f792370959ff26458f80942cf98fe8249d95
since I'm going to use the data pointer that was removed in
a follow up patch.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --cc drivers/net/wireless/rt2x00/rt2x00queue.c
Simple merge

diff --cc drivers/net/wireless/rt2x00/rt2x00queue.h
Simple merge

diff --cc drivers/net/wireless/rt2x00/rt2x00usb.c
Simple merge