x86, iosf: Add PCI ID macros for better readability

Introduce PCI IDs macro for the list of supported product:
BayTrail & Quark X1000.

Signed-off-by: Ong Boon Leong <boon.leong.ong@intel.com>
Link: http://lkml.kernel.org/r/1399668248-24199-5-git-send-email-david.e.box@linux.intel.com


Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>