network: Fix distrooverride for network: set mac address, removed networkd

The distrooverride changed from guf to seconorth, but these recipes
haven't been adapted yet and the syntax was not changed to the new.

recipes-core/systemd/systemd_%.bbappend

 # We use network manager for the guf distro
 # ( in fngsystem it is still in use)
-PACKAGECONFIG:remove:guf = " networkd "
+PACKAGECONFIG:remove:seconorth = " networkd "

recipes-seconorth/sharedconf/sharedconf.bb

@@ -98,7 +98,7 @@ do_install() {
     install -m 0644  ${S}/config-default-wlan0-ap.xml ${D}/usr/share/sharedconf/
 }
 
-pkg_postinst_ontarget:${PN}-network_guf () {
+pkg_postinst_ontarget:${PN}-network:seconorth () {
     # Write Network Manager connections SECO North device config during first boot
     ${sbindir}/gf-network-conf.sh --format=networkmanager generate
 }