ext qmsi: Build the power states support from QMSI

QMSI provides functions to set the SOC into its various power states,
and for Quark SE it also allows to control the voltage regulator, but
the files with these functions were not being built.

Change-Id: I40f08cdc970eb6696bc5f1d6cd0c407f64bec754
Signed-off-by: Iván Briano <ivan.briano@intel.com>