update alix2 platform driver

Add support for Ed Wildgoose's alix platform driver plus my
enhancement to add GPIO soft button support.

Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>

SVN-Revision: 28081

target/linux/x86/alix2/base-files/etc/hotplug.d/button/50-reboot

@@ -0,0 +1,13 @@
+#!/bin/sh
+
+logger -t button -p daemon.info "$BUTTON/$ACTION"
+
+case "$BUTTON/$ACTION" in
+
+reset/released)
+  reboot -f
+  ;;
+
+esac
+
+exit 0