[][MAC80211][WiFi7][misc][ensure the first MLD bss is bss[0]]

[Description]
Add validation for AP MLD so that the first MLD bss is always at bss[0]
in the config.

[Release-log]
N/A

Change-Id: I0cfbb3c5bfa2a2d73fa18aa0282aa60d2d78082d
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/9189284
1 file changed