mac80211: correct typo in comment : mac80211.h
mac80211: use the correct kernel doc format : mac80211.h
mac80211: update reference to 802.11-2012
mac80211: trivial: code style change: net/mac80211/status.c
cfg80211: trivial: code style change: net/wireless/util.c
b43: Kconfig: let config B43_BCMA_PIO depends on B43

Logically, config B43_BCMA_PIO should depend on B43. This also solves
the problem that sub options of b43 driver didn't indent correctly in
make menuconfig's ncurses window.
b43: return true / false instead of numbers in functions which return bool value