luci-mod-network: default to ieee80211w=2 for OWE

Ref: https://git.openwrt.org/?p=openwrt/openwrt.git;a=blob;f=package/network/services/hostapd/files/hostapd.sh;h=46acbefeeeb771de879dd9926ad170042dff2473;hb=HEAD#l327
Fixes: 63f28fd0

 luci-mod-network: default to ieee80211w=1 for OWE
Signed-off-by: Jo-Philipp Wich <jo@mein.io>