[SQUASH ME] basic_mac: address comments
[SQUASH ME] basic_mac: address more comments
[SQUASH ME] basic_mac: one rename more

https://www.youtube.com/watch?v=-qkf0fLU2Ao
sys: transceiver: Provide an adapter to netapi module

Since netapi is aimed to replace tranceiver one day, but porting
efforts usally take a while, this commit aims to provide access via
transceiver as we are used to for radio/network drivers that already implement
netapi (e. g. uart_net in #1454).
tests: transceiver: netapi: nativenet: Provide transceiver adapter tests
[SQUASH ME] transceiver: adapt for registry context
[SQUASH ME] transceiver: adapt for netapi changes
[SQUASH ME] transceiver: adapt for rename to nomac
[SQUASH ME] tests: transceiver: adapt for nomac rename