BUG: per_sta_vif and sae_passphrase's vlanid are not compatible

[rany]

Hello!

I'm currently facing an issue when both sae_passphrase's vlanid and 
per_sta_vif are used. When that happens, I could see from `brctl show` 
that the new AP_VLAN interface is created and added to the VLAN bridge 
very briefly and then immediately removed from the bridge. I'm not sure 
why this is happening but I figured it should be reported anyway.

I'm sorry if I'm short of details but below is my BSS config, if there 
is anything more I must provide please let me know:

interface=wl0-ap0
ctrl_interface=/var/run/hostapd
bss_load_update_period=60
chan_util_avg_period=600
disassoc_low_ack=1
skip_inactivity_poll=0
preamble=1
wmm_enabled=1
ignore_broadcast_ssid=0
uapsd_advertisement_enabled=1
utf8_ssid=1
multi_ap=0
tdls_prohibit=1
sae_require_mfp=1
sae_pwe=2
wpa_psk_file=/etc/hostapd.wpa_psk
sae_password_file=/etc/hostapd.sae_passwords
auth_algs=1
wpa=2
wpa_pairwise=CCMP
ssid=<redacted>
wnm_sleep_mode=1
wnm_sleep_mode_no_keys=1
wpa_disable_eapol_key_retries=1
wpa_key_mgmt=WPA-PSK FT-PSK WPA-PSK-SHA256 SAE FT-SAE
mobility_domain=41e3
ft_psk_generate_local=0
ft_over_ds=0
reassociation_deadline=1000
r0_key_lifetime=10000
pmk_r1_push=0
r0kh=ff:ff:ff:ff:ff:ff * <redacted>
r1kh=00:00:00:00:00:00 00:00:00:00:00:00 <redacted>
okc=1
ieee80211w=1
group_mgmt_cipher=AES-128-CMAC
dynamic_vlan=2
vlan_naming=1
vlan_bridge=br-vlan
vlan_no_bridge=
vlan_file=/var/run/hostapd-wl0-ap0.vlan
qos_map_set=0,0,2,16,1,1,255,255,18,22,24,38,40,40,44,46,48,56
bssid=<redacted>

Best