net80211: add few missing subtype names.

• Add definitions for Timing Advertisement and Control Wrapper frames.
• Refresh ieee80211_mgt_subtype_name and ieee80211_ctl_subtype_name

arrays.

• Count Timing Advertisement frames as discarded management frames in all

modes.

Approved by: adrian (mentor)
Differential Revision: https://reviews.freebsd.org/D5331