configs: Build test STB features on google skyrim

- Update the google_skyrim.with_binaries to test printing the STB
entries.
- Add a new saved config to test building without video, building
using an x86 verstage, and STB_SPILL_TO_DRAM

Signed-off-by: Martin Roth <gaumless@gmail.com>
Change-Id: Idddcf2441b91b79575e5dfed1cc56d207234205b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68928
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Fred Reitberger <reitbergerfred@gmail.com>
Reviewed-by: Jon Murphy <jpmurphy@google.com>
diff --git a/configs/config.google_skyrim.with_binaries b/configs/config.google_skyrim.with_binaries
index d0227af..530ace4 100644
--- a/configs/config.google_skyrim.with_binaries
+++ b/configs/config.google_skyrim.with_binaries
@@ -27,3 +27,5 @@
 CONFIG_DISPLAY_FSP_HEADER=y
 CONFIG_FATAL_ASSERTS=y
 CONFIG_DEBUG_SMI=y
+CONFIG_WRITE_STB_BUFFER_TO_CONSOLE=y
+CONFIG_ADD_POSTCODES_TO_STB=y