[][MAC80211][hostapd][Fix -EALREADY in setting beacon]

[Description]
Fix nl80211 or mac80211 return -EALREADY when hostapd sets the beacon

[Release-log]
N/A

Change-Id: I8d75ed5205a899f524ac3e2cea6d01daa5fefc7a
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7553082
3 files changed