net80211: migrate FC0_TYPE_MASK / FC0_SUBTYPE_MASK frame type checks to macros

• Add macros for the management and control frame type checks that I've come across in the drivers.
• Delete some now old code (eg ath's ieee80211_is_action()) as there's now a macro for it.

Local testing:

• not yet, I have a lot of wifi devices to find and test against

Differential Revision: https://reviews.freebsd.org/D47500