brcm47xx: remove target specific network preinit config

The generic preinit code is now able to setup network and switch vlan settings
from the /etc/board.json file, therefor drop the target specific code.

Fixes FS#790.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

target/linux/brcm47xx/base-files/lib/preinit/05_init_interfaces_brcm

@@ -1,16 +0,0 @@
-#!/bin/sh
-
-preinit_iface() {
-	ifname=eth0
-
-	# hardware specific overrides
-	case "$(awk 'BEGIN{FS="[ \t]+:[ \t]"} /machine/ {print $2}' /proc/cpuinfo)" in
-		"Asus WLHDD") ifname=eth1;;
-		"Asus WL300G") ifname=eth1;;
-	esac
-
-	local try=0;
-	while [ $((try++)) -le 5 ] && [ ! -f /sys/class/net/$ifname/operstate ]; do sleep 1; done
-}
-
-boot_hook_add preinit_main preinit_iface

target/linux/brcm47xx/base-files/lib/preinit/15_set_preinit_interface_brcm

@@ -1,16 +0,0 @@
-#!/bin/sh
-
-preinit_ip() {
-	# if the preinit interface isn't specified and ifname is set in
-	# preinit.arch use that interface
-	if [ -z "$pi_ifname" ]; then
-		pi_ifname=$ifname
-	fi
-
-	[ -n "$pi_ifname" ] && grep -q "$pi_ifname" /proc/net/dev && {
-		ifconfig $pi_ifname $pi_ip netmask $pi_netmask broadcast $pi_broadcast up
-
-		local try=0;
-		while [ $((try++)) -le 5 ] && [ ! "$(cat /sys/class/net/$pi_ifname/operstate)" = "up" ]; do sleep 1; done
-	}
-}