x86: Support Intel Cherry Hill board

This adds support to Intel Cherry Hill board, a board based on
Intel Braswell SoC. The following devices are validated:

- serial port as the serial console
- on-board Realtek 8169 ethernet controller
- SATA AHCI controller
- EMMC/SDHC controller
- USB 3.0 xHCI controller
- PCIe x1 slot with a graphics card
- ICH SPI controller with an 8MB Macronix SPI flash
- Integrated graphics device as the video console

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/dts/Makefile b/arch/x86/dts/Makefile
index 6589495..6d0c4b6 100644
--- a/arch/x86/dts/Makefile
+++ b/arch/x86/dts/Makefile
@@ -3,6 +3,7 @@
 #
 
 dtb-y += bayleybay.dtb \
+	cherryhill.dtb \
 	chromebook_link.dtb \
 	chromebox_panther.dtb \
 	chromebook_samus.dtb \