soc/amd/stoneyridge: Add southbridge definitions

* Add definitions to iomap.h for AMD ACPI MMIO base addresses.
* Add FCH AOAC registers for enabling FCH devices.
* From: BIOS and Kernel Developer's Guide (BKDG) for AMD Family 15h,
  Models 70h-7Fh Processors Rev 3.04

TEST=abuild, build Gardenia, build and boot Grunt

Change-Id: I45c1d1d7edc864000282c7ca4e2b8f2a14ea9eac
Signed-off-by: Garrett Kirkendall <>
Tested-by: build bot (Jenkins) <>
Reviewed-by: Martin Roth <>
Reviewed-by: Richard Spiegel <>
2 files changed