kernel: temp disable useless errors to fix build in newer gcc versions

workaround to fix build, this should be fixed in source soon

Change-Id: I334bd2a2e8eaca84055eee528e32d8214406ceb4
kernel: temp disale selinux

Change-Id: I153ec2c1aaa5e52c933413c4e7f6b72859ee2f86
set powersave as default cpufreq gov

Change-Id: Iae0c0d96a55ba7bbdd787c05b6472806de0435af