wpad decides whether to keep or tear down an MLD interface by comparing the
whole configuration object, which embedded the full device configuration of
every participating radio. Any radio level change, such as a channel or
txpower update, therefore destroyed and recreated the station MLD and
dropped the backhaul link. Neither hostapd nor wpa_supplicant reads
radio_config; it is only used locally to resolve the phy.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
e18424ddd8