vc/amd/opensil: Move openSIL interface declarations to common header

The declarations describing interface functions between SoCs
and openSIL glue code are common for the stub and Genoa POC,
and likely with future SoC openSIL implementations. Therefore,
move these out of SoC-specific header files and into
vc/amd/opensil/opensil.h.

This change facilitates swapping out the stub for the actual
openSIL glue code.

Change-Id: Icc8783ddb868f9f0c4cd357245604313eadfe531
Signed-off-by: Nicolas Kochlowski <nickkochlowski@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84428
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Varshit Pandya <pandyavarshit@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/genoa_poc/acpi.c

@@ -8,7 +8,7 @@
 #include <amdblocks/cpu.h>
 #include <arch/ioapic.h>
 #include <device/device.h>
-#include <vendorcode/amd/opensil/genoa_poc/opensil.h>
+#include <vendorcode/amd/opensil/opensil.h>
 
 void acpi_fill_fadt(acpi_fadt_t *fadt)
 {

src/soc/amd/genoa_poc/chip.c

@@ -5,7 +5,7 @@
 #include <device/device.h>
 #include <soc/southbridge.h>
 #include <soc/southbridge.h>
-#include <vendorcode/amd/opensil/genoa_poc/opensil.h>
+#include <vendorcode/amd/opensil/opensil.h>
 
 static void soc_init(void *chip_info)
 {

src/soc/amd/genoa_poc/domain.c

@@ -11,7 +11,7 @@
 #include <device/device.h>
 #include <types.h>
 
-#include <vendorcode/amd/opensil/genoa_poc/opensil.h>
+#include <vendorcode/amd/opensil/opensil.h>
 
 #define IOHC_IOAPIC_BASE_ADDR_LO 0x2f0
 

src/soc/amd/phoenix/acpi.c

@@ -19,7 +19,7 @@
 #include <device/device.h>
 #include <soc/iomap.h>
 #include <types.h>
-#include <vendorcode/amd/opensil/genoa_poc/opensil.h>
+#include <vendorcode/amd/opensil/opensil.h>
 #include "chip.h"
 
 /*

src/soc/amd/phoenix/chip.c

@@ -14,7 +14,7 @@
 #include <soc/pci_devs.h>
 #include <soc/southbridge.h>
 #include <types.h>
-#include <vendorcode/amd/opensil/stub/opensil.h>
+#include <vendorcode/amd/opensil/opensil.h>
 #include "chip.h"
 
 static const char *soc_acpi_name(const struct device *dev)

src/soc/amd/phoenix/memmap.c

@@ -5,7 +5,7 @@
 #include <amdblocks/root_complex.h>
 #include <device/device.h>
 #include <stdint.h>
-#include <vendorcode/amd/opensil/stub/opensil.h>
+#include <vendorcode/amd/opensil/opensil.h>
 
 /*
  *                     +--------------------------------+