[FS#700] hostapd: nl80211: failed to remove interface from bridge: Invalid argument

[LEDE Bugs]

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FS#700 - hostapd: nl80211: failed to remove interface from bridge: Invalid argument
User who did this: Yousong Zhou (yousong)
Summary: hostapd: nl80211 failed to remove interface from bridge: Invalid argument -> hostapd: nl80211: failed to remove interface from bridge: Invalid argument

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=700