ath9k: make ath_frame_info fit into reduced-size rate_driver_data
ath9k: make ath_frame_info fit into reduced-size rate_driver_data

pre-requisite to shrink size of ieee80211_tx_info which in turn is
needed to shrink skb->cb to 40 bytes again.

Signed-off-by: Florian Westphal <cef439e78636cdab99cd2923826c5065a0743e5b@strlen.de>
Signed-off-by: Kalle Valo <7081a7d99b8c74c0698a728df19e3915a995d7e1@codeaurora.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs