Try cortex-a8 CPU variant to fit optimizations in Build

* Also we use the AOSP boot amination, so remove the configs from CM.

Change-Id: Ic7271c2a18cf53e0f2955ce3e4146fdacd5ee698
Revert "ramdisk: a quick workaround for akmd not running"

This reverts commit d12cfeae5b5887b09f84480020a11683c56092f5.