wwan: T3620: place interface in A/D state when removed
wwan: T3620: place interface in A/D state when removed

(cherry picked from commit 61e4d75abb1129f63df5a47b9c9bf0553850d893)

vyos/vyos-1x,vyos/vyos-1x,vyos/vyos-1x,vyos/vyos-1x