x86: galileo: Enable ACPI table generation

Enable ACPI table generation by creating a DSDT table.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

board/intel/galileo/.gitignore

@@ -0,0 +1,3 @@
+dsdt.aml
+dsdt.asl.tmp
+dsdt.c

board/intel/galileo/Makefile

@@ -5,3 +5,4 @@
 #
 
 obj-y	+= galileo.o start.o
+obj-$(CONFIG_GENERATE_ACPI_TABLE) += dsdt.o

board/intel/galileo/acpi/mainboard.asl

@@ -0,0 +1,11 @@
+/*
+ * Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/* Power Button */
+Device (PWRB)
+{
+	Name(_HID, EISAID("PNP0C0C"))
+}

board/intel/galileo/dsdt.asl

@@ -0,0 +1,14 @@
+/*
+ * Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+DefinitionBlock("dsdt.aml", "DSDT", 2, "U-BOOT", "U-BOOTBL", 0x00010000)
+{
+	/* platform specific */
+	#include <asm/arch/acpi/platform.asl>
+
+	/* board specific */
+	#include "acpi/mainboard.asl"
+}