boards: meson: add g12a u200

The Amlogic U200 board is based on the Amlogic S905D2 SoC
from the Amlogic G12A SoC family.

The board has the following specifications :
 - Amlogic S905D2 ARM Cortex-A53 quad-core SoC
 - XGB DDR4 SDRAM
 - 10/100 Ethernet (Internal PHY)
 - 1 x USB 3.0 Host
 - eMMC
 - SDcard
 - Infrared receiver
 - SDIO WiFi Module
 - MIPI DSI Connector
 - Audio HAT Connector
 - PCI-E M.2 Connector

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/board/amlogic/u200/u200.c b/board/amlogic/u200/u200.c
new file mode 100644
index 0000000..94ee3ce
--- /dev/null
+++ b/board/amlogic/u200/u200.c
@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2016 BayLibre, SAS
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <environment.h>
+#include <asm/io.h>
+#include <asm/arch/axg.h>
+#include <asm/arch/sm.h>
+#include <asm/arch/eth.h>
+#include <asm/arch/mem.h>
+
+int misc_init_r(void)
+{
+	meson_eth_init(PHY_INTERFACE_MODE_RMII,
+		       MESON_USE_INTERNAL_RMII_PHY);
+
+	return 0;
+}