lantiq: td-w8970: fix failsafe mode

Fix failsafe mode for TD-W8970, register interface for preinit.

Signed-off-by: Cezary Jackiewicz <cezary.jackiewicz@gmail.com>

SVN-Revision: 44353

target/linux/lantiq/base-files/lib/preinit/05_set_preinit_iface_lantiq

+#!/bin/sh
+
+. /lib/functions/lantiq.sh
+
+set_preinit_iface() {
+
+	board=$(lantiq_board_name)
+
+	case "$board" in
+	TDW8970)
+		ifname=eth0
+		;;
+	esac
+
+}
+
+boot_hook_add preinit_main set_preinit_iface
+