package/systemd: use interface name for networkd config file

By using the interface in the filename for the networkd config file,
we have a clear association between the config file and the interface
it applies to.

This is beneficical for systems that have multiple interfaces.

Signed-off-by: Pascal de Bruijn <p.debruijn@unilogic.nl>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/systemd/systemd.mk

@@ -330,7 +330,7 @@ ifneq ($(SYSTEMD_NETWORKD_DHCP_IFACE),)
 define SYSTEMD_INSTALL_NETWORK_CONFS
 	sed s/SYSTEMD_NETWORKD_DHCP_IFACE/$(SYSTEMD_NETWORKD_DHCP_IFACE)/ \
 		$(SYSTEMD_PKGDIR)/dhcp.network > \
-		$(TARGET_DIR)/etc/systemd/network/dhcp.network
+		$(TARGET_DIR)/etc/systemd/network/$(SYSTEMD_NETWORKD_DHCP_IFACE).network
 endef
 endif
 else