fritzbox-7530: utilize lan1 as wan, others as lan

With the switch to DSA on this board, we can now utilize the ports better, by splitting them according to their usage

Signed-off-by: Florian Maurer <f.maurer@outlook.de>

package/gluon-core/luasrc/lib/gluon/upgrade/020-interfaces

@@ -63,6 +63,10 @@ elseif platform.match('ath79', 'generic', {
 	'ubnt,unifiac-pro',
 }) then
 	lan_ifname, wan_ifname = 'eth0.2', 'eth0.1'
+elseif platform.match('ipq40xx', 'generic', {
+	'avm,fritzbox-7530',
+}) then
+	lan_ifname, wan_ifname = 'lan2 lan3 lan4', 'lan1'
 elseif platform.match('ramips', 'mt7621', {
 	'netgear,wac104',
 }) then