x86: apl: Generate required ACPI tables

Add support for generating various ACPI tables for Apollo Lake. Add a few
S3 definitions that are needed.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/include/asm/arch-apollolake/acpi.h b/arch/x86/include/asm/arch-apollolake/acpi.h
new file mode 100644
index 0000000..ed852fe
--- /dev/null
+++ b/arch/x86/include/asm/arch-apollolake/acpi.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright 2019 Google LLC
+ */
+
+#ifndef _ASM_ARCH_ACPI_H
+#define _ASM_ARCH_ACPI_H
+
+struct acpi_ctx;
+
+/**
+ * apl_acpi_fill_dmar() - Set up the DMAR for APL
+ *
+ * @ctx: ACPI context pointer
+ */
+int apl_acpi_fill_dmar(struct acpi_ctx *ctx);
+
+#endif /* _ASM_ARCH_CPU_H */