boards: amlogic: add SEI610 support

Add support for the customer board SEI610 manufactured by SEI Robotics
with the following specifications:
 - Amlogic S905X3 ARM Cortex-A55 quad-core SoC
 - 2GB DDR4 SDRAM
 - 10/100 Ethernet (Internal PHY)
 - 1 x USB 3.0 Host
 - 1 x USB Type-C DRD
 - 1 x FTDI USB Serial Debug Interface
 - eMMC
 - SDcard
 - Infrared receiver
 - SDIO WiFi Module

Like it's SEI510 counterpart, the boot flow is designed to boot
Android AOSP built for the Yukawa Android device.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/board/amlogic/sei610/Makefile b/board/amlogic/sei610/Makefile
new file mode 100644
index 0000000..428792a
--- /dev/null
+++ b/board/amlogic/sei610/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# (C) Copyright 2016 BayLibre, SAS
+# Author: Neil Armstrong <narmstrong@baylibre.com>
+
+obj-y	:= sei610.o