[][MAC80211][mt76][Update beacon size limitation for 11v]

Change beacon size limitation for 11v.
Separate the beacon offload command into two;
one is for beacons and the other is for inband discovery frames.
Also, the TLV size limitation for these two has been expanded to
accommodate 11v MBSSID IE.


Change-Id: Ibf2376056e9dbb732000eca0ef9eda28468d2c75
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7259668
2 files changed