soc/intel/*: Use SSDT to pass A4GB and A4GS

GNVS is more fragile as you need to keep struct elements in sync with
ASL code.

Change-Id: I2cd5e6b56e4a0dbbb11f4a0ac97e8f84d53b90ec
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64216
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>
diff --git a/src/soc/intel/apollolake/chip.c b/src/soc/intel/apollolake/chip.c
index c98d1c4..0228cd2 100644
--- a/src/soc/intel/apollolake/chip.c
+++ b/src/soc/intel/apollolake/chip.c
@@ -22,6 +22,7 @@
 #include <intelblocks/gpio.h>
 #include <intelblocks/itss.h>
 #include <intelblocks/pmclib.h>
+#include <intelblocks/systemagent.h>
 #include <option.h>
 #include <soc/cpu.h>
 #include <soc/heci.h>
@@ -202,6 +203,7 @@
 	.set_resources = pci_domain_set_resources,
 	.scan_bus = pci_domain_scan_bus,
 	.acpi_name = &soc_acpi_name,
+	.acpi_fill_ssdt = ssdt_set_above_4g_pci,
 };
 
 static struct device_operations cpu_bus_ops = {