ext qmsi: Fix registers definition for LPSS

This is fixed in QMSI 1.1 already and this patch can be reverted when
the next released is merged into Zephyr.

Original commit message:
While performing power measurements in LPSS, it appeared that the value
for LPSS registers was incorrect. Fix this value to enable proper entry
in LPSS mode.

Change-Id: Ie6a4aa5c9aa01ebaad0cd2db722bb9b5c87df5e7
Signed-off-by: Julien Delayen <julien.delayen@intel.com>
Signed-off-by: Iván Briano <ivan.briano@intel.com>