x86: baytrail: Enable ACPI table generation for all boards

Enable ACPI table generation by creating a DSDT table for all baytrail
boards: conga-qeval20-qa3-e3845, bayleybay and minnowmax.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Tested-by: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/board/intel/minnowmax/Makefile b/board/intel/minnowmax/Makefile
index 1a61432..73e5a8f 100644
--- a/board/intel/minnowmax/Makefile
+++ b/board/intel/minnowmax/Makefile
@@ -5,3 +5,4 @@
 #
 
 obj-y	+= minnowmax.o start.o
+obj-$(CONFIG_GENERATE_ACPI_TABLE) += dsdt.o