The internal hostapd version cannot be built with EAP-pwd support, so
enable it only for the SSL variants.
Fixes: #17163
Fixes: 6365316fab ("hostapd: add ubus support for wired driver")
Link: https://github.com/openwrt/openwrt/pull/17164
Signed-off-by: Robert Marko <robimarko@gmail.com>