soc/intel/elkhartlake: Switch to runtime generation of Power Engine

The pep.asl file is being obsoleted by runtime generation, therefore
switch elkhartlake boards to this method.

Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Change-Id: I47f03b440729d4b37ae0abc84bd1d18c4e01657d
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56012
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/soc/intel/elkhartlake/Kconfig

@@ -40,6 +40,7 @@ config CPU_SPECIFIC_OPTIONS
 	select SOC_INTEL_COMMON_BLOCK_ACPI
 	select SOC_INTEL_COMMON_BLOCK_ACPI_GPIO
 	select SOC_INTEL_COMMON_BLOCK_ACPI_LPIT
+	select SOC_INTEL_COMMON_BLOCK_ACPI_PEP
 	select SOC_INTEL_COMMON_BLOCK_CAR
 	select SOC_INTEL_COMMON_BLOCK_CHIP_CONFIG
 	select SOC_INTEL_COMMON_BLOCK_CPU

src/soc/intel/elkhartlake/acpi/southbridge.asl

@@ -38,9 +38,6 @@
 /* PCI _OSC */
 #include <soc/intel/common/acpi/pci_osc.asl>
 
-/* Intel Power Engine Plug-in */
-#include <soc/intel/common/block/acpi/acpi/pep.asl>
-
 /* EMMC/SD card */
 #include "scs.asl"
 

src/soc/intel/elkhartlake/pmc.c

@@ -4,6 +4,7 @@
 #include <console/console.h>
 #include <device/device.h>
 #include <device/mmio.h>
+#include <intelblocks/acpi.h>
 #include <intelblocks/pmc.h>
 #include <intelblocks/pmclib.h>
 #include <intelblocks/rtc.h>
@@ -93,9 +94,18 @@ static void soc_acpi_mode_init(struct device *dev)
 	pmc_set_acpi_mode();
 }
 
+static void pmc_fill_ssdt(const struct device *dev)
+{
+	if (CONFIG(SOC_INTEL_COMMON_BLOCK_ACPI_PEP))
+		generate_acpi_power_engine();
+}
+
 struct device_operations pmc_ops = {
 	.read_resources		= soc_pmc_read_resources,
 	.set_resources		= noop_set_resources,
 	.init			= soc_acpi_mode_init,
 	.enable			= pmc_init,
+#if CONFIG(HAVE_ACPI_TABLES)
+	.acpi_fill_ssdt		= pmc_fill_ssdt,
+#endif
 };