vendorcode/amd/opensil: Add initial setup and API calls

- First a console is set up for opensil.
- After that a region in CBMEM is reserved and passed to opensil which
will use it as a buffer for input/output information.
- Finally opensil is called and the return value handled.

Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Change-Id: I4833a5a86034a13e6be102a6b68c3bb54108bc9a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76515
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/commonlib/bsd/include/commonlib/bsd/cbmem_id.h

@@ -89,6 +89,7 @@
 #define CBMEM_ID_AMD_MP2	0x5f32504d
 #define CBMEM_ID_CSE_INFO	0x4553435F
 #define CBMEM_ID_CSE_BP_INFO	0x42455343
+#define CBMEM_ID_AMD_OPENSIL	0x4153494C
 
 #define CBMEM_ID_TO_NAME_TABLE				 \
 	{ CBMEM_ID_ACPI,		"ACPI       " }, \
@@ -170,5 +171,6 @@
 	{ CBMEM_ID_AMD_STB,		"AMD STB"},\
 	{ CBMEM_ID_AMD_MP2,		"AMD MP2 BUFFER"},\
 	{ CBMEM_ID_CSE_INFO,		"CSE SPECIFIC INFO"},\
-	{ CBMEM_ID_CSE_BP_INFO,		"CSE BP INFO"}
+	{ CBMEM_ID_CSE_BP_INFO,		"CSE BP INFO"}, \
+	{ CBMEM_ID_AMD_OPENSIL,		"OPENSIL DATA"}
 #endif /* _CBMEM_ID_H_ */