hostapd: recognize 8021x as an authentication mode

hostapd: recognize 8021x as an authentication mode

Currently, in order to configure the authentication daemon in
8021x mode, we need to set wireless.@wifi-iface[0].encryption="wpa"
Though it works it confuses folks as 8021x is using WEP
encryption and not WPA. Therefore the terminology itself is
confusing. This change adds 8021x as a recognized string for 8021x
authentication.

Signed-off-by: Mathieu Olivari <mathieu@qca.qualcomm.com>
Signed-off-by: Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38339 3c298f89-4303-0410-b956-a3cf2f4a3e73