platform/x86: intel/pmc: Relocate Sunrise Point PCH support

platform/x86: intel/pmc: Relocate Sunrise Point PCH support

Create spt.c for Sunrise Point PCH specific structures and init().
This file supports Sky Lake and Kaby Lake platforms. There are no
functional changes involved.

Cc: David E Box <david.e.box@linux.intel.com>
Reviewed-by: "David E. Box" <david.e.box@linux.intel.com>
Signed-off-by: Rajvi Jingar <rajvi.jingar@linux.intel.com>
Signed-off-by: "David E. Box" <david.e.box@linux.intel.com>
Link: https://lore.kernel.org/r/20221114183257.2067662-4-gayatri.kammela@linux.intel.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>