arm64: tegra: Add NVIDIA P2771 board support

The NVIDIA P2771 is composed of a P3310 processor module that connects
to the P2597 I/O board. It comes with a 1200x1920 MIPI DSI panel that is
connected via the P2597's display connector and has several connectors
such as HDMI, USB 3.0, PCIe and ethernet.
Signed-off-by: Joseph Lo <josephl@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm64/boot/dts/nvidia/Makefile

@@ -3,6 +3,7 @@ dtb-$(CONFIG_ARCH_TEGRA_210_SOC) += tegra210-p2371-0000.dtb
 dtb-$(CONFIG_ARCH_TEGRA_210_SOC) += tegra210-p2371-2180.dtb
 dtb-$(CONFIG_ARCH_TEGRA_210_SOC) += tegra210-p2571.dtb
 dtb-$(CONFIG_ARCH_TEGRA_210_SOC) += tegra210-smaug.dtb
+dtb-$(CONFIG_ARCH_TEGRA_186_SOC) += tegra186-p2771-0000.dtb
 
 always		:= $(dtb-y)
 clean-files	:= *.dtb

arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts

+/dts-v1/;
+
+#include "tegra186-p3310.dtsi"
+
+/ {
+	model = "NVIDIA Tegra186 P2771-0000 Development Board";
+	compatible = "nvidia,p2771-0000", "nvidia,tegra186";
+};