ARM: tegra: add p2771-0000 board support

P2771-0000 is a P3310 CPU board married to a P2597 I/O board. The
combination contains SoC, DRAM, eMMC, SD card slot, HDMI, USB micro-B
port, Ethernet, USB3 host port, SATA, PCIe, and two GPIO expansion
headers.

Currently, due to U-Boot's level of support for Tegra186, the only
features supported by U-Boot are the console UART and the on-board eMMC.
Additional features will be added over time.

U-Boot has so far been tested by replacing the kernel image on the device
with a U-Boot binary. It is anticipated that U-Boot will eventually
replace the CCPLEX bootloader binary, as on previous chips. This hasn't
yet been tested.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>

board/nvidia/p2771-0000/Kconfig

@@ -0,0 +1,16 @@
+# Copyright (c) 2016, NVIDIA CORPORATION.
+#
+# SPDX-License-Identifier: GPL-2.0
+
+if TARGET_P2771_0000
+
+config SYS_BOARD
+	default "p2771-0000"
+
+config SYS_VENDOR
+	default "nvidia"
+
+config SYS_CONFIG_NAME
+	default "p2771-0000"
+
+endif

board/nvidia/p2771-0000/MAINTAINERS

@@ -0,0 +1,6 @@
+P2771-0000 BOARD
+M:	Stephen Warren <swarren@nvidia.com>
+S:	Maintained
+F:	board/nvidia/p2771-0000/
+F:	include/configs/p2771-0000.h
+F:	configs/p2771-0000_defconfig

board/nvidia/p2771-0000/Makefile

@@ -0,0 +1,5 @@
+# Copyright (c) 2016, NVIDIA CORPORATION.
+#
+# SPDX-License-Identifier: GPL-2.0
+
+obj-y	+= p2771-0000.o

board/nvidia/p2771-0000/p2771-0000.c

@@ -0,0 +1,7 @@
+/*
+ * Copyright (c) 2016, NVIDIA CORPORATION
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <common.h>