EM/THERMAL: Enable platform thermal driver for Merrifield

EM/THERMAL: Enable platform thermal driver for Merrifield

BZ: 15131

This patch enables the platform thermal driver for
Merrifield BasinCove PMIC. This patch contains the
driver's initialization flow and exposes sysfs interfaces
to manipulate the PMIC Thermal registers

Change-Id: I17ec9f523f0c32eb8c7960057fc2eff7e512b88c
Signed-off-by: Amar Shankar <amarx.shankar@intel.com>
Reviewed-on: http://android.intel.com:8080/43213
Tested-by: P, Eshwar N <eshwar.n.p@intel.com>
Reviewed-by: Pujol, BenjaminX <benjaminx.pujol@intel.com>
Reviewed-by: Tc, Jenny <jenny.tc@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>