Add sb800 spi support.

It is for S3, storing the recovring data in the nonvolatile storage,
i.e., flash.

Change-Id: Ie9e4f42a80c93d92d2e442f0e833ce06d88294f9
Signed-off-by: Zheng Bao <zheng.bao@amd.com>
Signed-off-by: zbao <fishbaozi@gmail.com>
Reviewed-on: http://review.coreboot.org/620
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marcj303@gmail.com>
diff --git a/src/southbridge/amd/cimx/sb800/Makefile.inc b/src/southbridge/amd/cimx/sb800/Makefile.inc
index 30d2133..2b55fee 100644
--- a/src/southbridge/amd/cimx/sb800/Makefile.inc
+++ b/src/southbridge/amd/cimx/sb800/Makefile.inc
@@ -27,6 +27,8 @@
 ramstage-y += cfg.c
 ramstage-y += late.c
 
+ramstage-$(CONFIG_HAVE_ACPI_RESUME) += spi.c
+
 driver-y   += smbus.c
 driver-y   += lpc.c