rt2x00: Rename queue->lock to queue->index_lock

The queue->lock is only used to protect the index
numbers. Rename the lock accordingly.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --cc drivers/net/wireless/rt2x00/rt2x00debug.c
Simple merge

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

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