ath5k: clean up queue manipulation

ath5k: clean up queue manipulation

Review spotted a couple of strange invocations to
ieee80211_wake_queues that could potentially cause problems:

 - queues are awakened in the calibration tasklet before
   phy calibration, and then again after calibration

 - queues are awakened inside reset when we're trying to
   drain the ath5k transmit queues, and again after
   reset is completed (in callers to ath5k_reset_wake).

In both cases the first wake is unnecessary, so remove it.

Signed-off-by: Bob Copeland <me@bobcopeland.com>
Acked-by: Bruno Randolf <br1@einfach.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>