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>
diff --git a/src/southbridge/amd/cimx/sb800/SBPLATFORM.h b/src/southbridge/amd/cimx/sb800/SBPLATFORM.h
index 25aba95..7dc752a 100644
--- a/src/southbridge/amd/cimx/sb800/SBPLATFORM.h
+++ b/src/southbridge/amd/cimx/sb800/SBPLATFORM.h
@@ -162,4 +162,7 @@
 #include "spi.h"
 #endif
 
+#define BIOSRAM_INDEX   0xcd4
+#define BIOSRAM_DATA    0xcd5
+
 #endif // _AMD_SBPLATFORM_H_