[][MAC80211][WiFi6][hostapd][New support for single BSS operations]

[Description]
Add support for 2 per-BSS operations (including the first one)
1. Remove the BSS:
   $ hsotapd_cli -i global raw REMOVE_BSS <ifname>
2. enable/disable the BSS:
   $ hostapd_cli -i <ifname> enable_bss
   $ hostapd_cli -i <ifname> disable_bss

[Release-log]
N/A

Change-Id: I76f61e557cecb202105ed4667f490a4a49ea610e
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/8407972
2 files changed