defconfig update

Change-Id: I5a89729cdfbbf1701f17d0de95d35cdce4d25aac
mm; Tweak read ahead

Change-Id: Ia95281ea96f1bcfcd8791f4e9f4540243830f587
Updated thermal config

Change-Id: Id4fb1f1a9e115e314448981d0aa27dbd652a1d8d