remove prebuilt egl.cfg and use sysfs instead (created by kernel module)

Change-Id: I36c4497157138ce88aef34f85dfbc2b747f09e7d
recovery: backlight path

Change-Id: If22bab60d1bed5bd9922c8e1913a9b21fa505fdd
Merge remote-tracking branch 'origin/cm-10.1' into cm-10.1