Documentation: Add DT binding doc for Tegra SPI Aurix communciation

Add DT binding document for NVIDIA Tegra SPI Aurix communication.

bug 3583584

Change-Id: I6e9f949add8503b018e58e68347922359e559474
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2708697
GVS: Gerrit_Virtual_Submit

Documentation/devicetree/bindings/spi/spi-aurix-tegra.yaml

@@ -0,0 +1,44 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spi/spi-aurix-tegra.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: DT binding for Tegra SPI Aurix communication protocol driver
+
+maintainers:
+  - Lars-Peter Clausen <lars@metafoo.de>
+  - Jonathan Cameron <jic23@kernel.org>
+
+description: |
+  This driver communicates to AUrix over SPI channel with agreed
+  protocols.
+
+properties:
+  compatible:
+    enum:
+      - aurix-tegra-spi
+
+  reg:
+    maxItems: 1
+
+  spi-max-frequency: true
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+
+examples:
+  - |
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        spi@0 {
+           reg = <0>;
+           compatible = "aurix-tegra-spi";
+           spi-max-frequency = <10000000>;
+        };
+    };
+...