luci-mod-status: use network.getDSLModemType()

This matches what luci-mod-network does for the DSL modem configuration.

Since this is based on a common uci config, it may also prevent issues as
fixed with 111c551c "luci-base: fix DSL feature detection" in the future.

Signed-off-by: Andre Heider <a.heider@gmail.com>

modules/luci-mod-status/htdocs/luci-static/resources/view/status/include/50_dsl.js

@@ -1,5 +1,6 @@
 'use strict';
 'require baseclass';
+'require network';
 'require rpc';
 
 var callDSLMetrics = rpc.declare({
@@ -44,7 +45,7 @@ return baseclass.extend({
 	title: _('DSL'),
 
 	load: function() {
-		if (!L.hasSystemFeature('dsl'))
+		if (!network.getDSLModemType())
 			return Promise.reject();
 
 		return L.resolveDefault(callDSLMetrics(), {});