bcm53xx: fix default network interface on Netgear R8000

It has 3 Ethernet interfaces, each of them connected to separated switch
port. Default NVRAM uses switch port 8 as CPU which is connected to the
3rd interface (eth2).

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@45681 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/bcm53xx/base-files/etc/board.d/02_network

@@ -7,9 +7,18 @@
 
 board_config_update
 
-ucidef_set_interface_loopback
+board=$(cat /proc/device-tree/compatible | tr '\0' '\t' | cut -f 1)
+case "$board" in
+netgear,r8000)
+	ifname=eth2
+	;;
+*)
+	ifname=eth0
+	;;
+esac
 
-ucidef_set_interfaces_lan_wan "eth0.1" "eth0.2"
+ucidef_set_interface_loopback
+ucidef_set_interfaces_lan_wan "$ifname.1" "$ifname.2"
 ucidef_add_switch "switch0" "1" "1"
 
 # NVRAM entries may contain unsorted ports, e.g. Netgear R6250 uses