Add Southbridge support for S3.

1. Add some CIMX call for S3.
2. Detect sleep type.

Change-Id: I62888e8d8a03987ca88f5c935fa660f6b49a4fe9
Signed-off-by: Zheng Bao <zheng.bao@amd.com>
Signed-off-by: zbao <fishbaozi@gmail.com>
Reviewed-on: http://review.coreboot.org/621
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
8 files changed