x86: Add basic Intel Galileo board support

New board/intel/galileo board directory with minimum codes, plus
board dts, defconfig and configuration files.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/dts/Makefile b/arch/x86/dts/Makefile
index 4e0171a..7a66133 100644
--- a/arch/x86/dts/Makefile
+++ b/arch/x86/dts/Makefile
@@ -1,5 +1,6 @@
 dtb-y += chromebook_link.dtb \
 	crownbay.dtb \
+	galileo.dtb \
 	minnowmax.dtb
 
 targets += $(dtb-y)