brcm47xx: remove obsolete hotplug stuff

SVN-Revision: 37271

target/linux/brcm47xx/base-files/lib/preinit/03_init_hotplug_failsafe_brcm

@@ -1,7 +0,0 @@
-#!/bin/sh
-
-init_hotplug_failsafe() {
-	echo '/sbin/hotplug.failsafe' > /proc/sys/kernel/hotplug
-}
-
-boot_hook_add preinit_main init_hotplug_failsafe

target/linux/brcm47xx/base-files/sbin/hotplug.failsafe

@@ -1,4 +0,0 @@
-#!/bin/sh
-case "$1" in
-	button) kill -USR1 1;;
-esac