* mac80211: bump to 5.8-rc2

changelog:
  dfe0bc8 mac80211: allow ACS restriction with fixed channel
  727685c mac80211: rt2x00: define RF5592 in init_eeprom routine
  cfd2f3b mac80211: create channel list for fixed channel operation
  d1100c7 mac80211: Update to version 5.7.5-1
  ed2015c mac80211: Update to version 5.8-rc2-1
  a956c14 mac80211: util: don't warn on missing sband iftype data
  8b3e170 hostapd: fix incorrect service name
  68bf5a9 mac80211: don't kill wireless daemon on teardown
  25e0ae6 mac80211: make cfg80211 testmode support optional (and disabled by default)
  b7727a8 mac80211: fix AQL issues
  3d731fc mac80211: merge performance improvement patches

* mt76: update to 2020-07-22
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

* mac80211: allow VHT on 2.4GHz

Allow VHT rate on 2.4GHz in order to use 256-QAM
Signed-off-by: NDENG Qingfang <dengqf6@mail2.sysu.edu.cn>

* ath10k: allow VHT on 2.4GHz
Signed-off-by: NDENG Qingfang <dengqf6@mail2.sysu.edu.cn>

* hostapd: add vendor_vht option

hostapd has vendor_vht option to enable VHT (256-QAM) on 2.4GHz
Add this option to hostapd.sh so users can enable it via uci
Signed-off-by: NDENG Qingfang <dengqf6@mail2.sysu.edu.cn>

* ipq807x: Refresh kernel configuration
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>

* ipq807x: Add WCSS bus

This is needed to build ath11k.
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>

* mac80211: Add ath11k

This adds the Qualcomm 802.11ax wireless chipset support.
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Co-authored-by: NFelix Fietkau <nbd@nbd.name>
Co-authored-by: NDENG Qingfang <dengqf6@mail2.sysu.edu.cn>
Co-authored-by: NHauke Mehrtens <hauke@hauke-m.de>