soc/intel/xeon_sp/acpi: Add pch.asl

Add ASL for the PCH. Initially, this only contains
soc/intel/common/block/acpi/acpi/lpc.asl. Additional PCH ASL
may be added in the future.

Change-Id: I70cb790355430f63f25e0dbc9fccc22462fe3572
Signed-off-by: Marc Jones <marcjones@sysproconsulting.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45836
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/xeon_sp/acpi/pch.asl

@@ -0,0 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+/* This file should be included in the proper platform ACPI \_SB PCI scope */
+
+/* LPC 0:1f.0 */
+#include <soc/intel/common/block/acpi/acpi/lpc.asl>