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>
diff --git a/board/intel/galileo/Makefile b/board/intel/galileo/Makefile
index 8356df1..bbe2f8b 100644
--- a/board/intel/galileo/Makefile
+++ b/board/intel/galileo/Makefile
@@ -5,3 +5,4 @@
 #
 
 obj-y	+= galileo.o start.o
+obj-$(CONFIG_GENERATE_ACPI_TABLE) += dsdt.o