Change of naming conversion and field max_4ms_framelen. (r255101)
* change "IEEE80211_RATECTL_OPT_*" to "IEEE80211_RATECTL_CAP_*". change field
  "options" of ieee80211_ratectl to "ir_capabilities". update the references.
* fix error on initialization of ir_capabilities.
* re-add max4msframelen to ieee80211_rc_series. port max_4ms_framelen[4][32]
  to ieee80211_ratectl. also add setup of max4msframelen to
  ieee80211_ratectl_complete_rcflags().
* move ieee80211_ratectl_complete_rcflags() to ieee80211_ratectl.c, also put
  max_4ms_framelen[4][32] there.
* add pre-compile declaration to ieee80211_ratectl.h. (strange it not appeared)
Merge branch 'master' of github.com:qinchenchong/freebsd_net80211_ratectl