feat(intel): restructure sys mgr for S10/N5X

This patch is to restructure system manager. Move platform dependent
MACROs to individual platform system manager. Common system manager will
remain for those common declaration only.

Signed-off-by: Jit Loon Lim <jit.loon.lim@intel.com>
Change-Id: I385455671413e154d04a879d33fdd774fcfefbd6
7 files changed