arm64: tegra: Add NVIDIA P2371 board support

The NVIDIA P2371 is an internal reference design that uses a P2530
processor module hooked up to a P2595 I/O board and an optional display
module for a 1200x1920 MIPI DSI panel.
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm64/boot/dts/nvidia/Makefile

 dtb-$(CONFIG_ARCH_TEGRA_132_SOC) += tegra132-norrin.dtb
+dtb-$(CONFIG_ARCH_TEGRA_210_SOC) += tegra210-p2371-0000.dtb
 
 always		:= $(dtb-y)
 clean-files	:= *.dtb

arch/arm64/boot/dts/nvidia/tegra210-p2371-0000.dts

+/dts-v1/;
+
+#include "tegra210-p2530.dtsi"
+#include "tegra210-p2595.dtsi"
+
+/ {
+	model = "NVIDIA Tegra210 P2371 (P2530/P2595) reference design";
+	compatible = "nvidia,p2371-0000", "nvidia,tegra210";
+};