udhcp: rename server/client_config.arp to server_mac and client_mac

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/networking/udhcp/dhcpd.c b/networking/udhcp/dhcpd.c
index 5993042..c74a11b 100644
--- a/networking/udhcp/dhcpd.c
+++ b/networking/udhcp/dhcpd.c
@@ -93,8 +93,11 @@
 	leases = xzalloc(server_config.max_leases * sizeof(*leases));
 	read_leases(server_config.lease_file);
 
-	if (udhcp_read_interface(server_config.interface, &server_config.ifindex,
-			   &server_config.server_nip, server_config.arp)) {
+	if (udhcp_read_interface(server_config.interface,
+			&server_config.ifindex,
+			&server_config.server_nip,
+			server_config.server_mac)
+	) {
 		retval = 1;
 		goto ret;
 	}