Remove HAVE_SELINUX guards

Android 4.3, and by extension CM 10.2, default to having SELinux on

Change-Id: Ie7853727102725a75a7d6fa3b3b35b1ffaacd89a
ueventd: restorecon sysfs files

Allow cpufreq governor tuning files to be labelled correctly after
switching governor.

Change-Id: I3e0fd310aaacbb4e647e42597d38040774257955