* Increase timeouts on ath5k_hw_stop_tx_dma and also wait for
 tx queue to stop before checking for pending frames

 * Add a new debug level to debug dma start/stop
Signed-off-by: NNick Kossifidis <mickflemm@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>