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

Change-Id: I0f4a2bbdeeb527e720314c0e209ae0e10d5b16a8
update prebuilt kernel

Change-Id: I2fa1604363990655d7dcfbaece42d2865db4da3d
recovery: backlight path

Change-Id: I94993e79a6b3781125958f345d1c5e207b415d67