dt-bindings: Add devicetree bindings

Add snapshot of device tree bindings from keystone common kernel, branch
"android-mainline-keystone-qcom-release" at c4c12103f9c0 ("Snap for 9228065
from e32903b9a63bb558df8b803b076619c53c16baad to
android-mainline-keystone-qcom-release").

Change-Id: I7682079615cbd9f29340a5c1f2a1d84ec441a1f1
Signed-off-by: Melody Olvera <quic_molvera@quicinc.com>

bindings/arm/amazon,al.yaml

@@ -0,0 +1,35 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/amazon,al.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Amazon's Annapurna Labs Alpine Platform
+
+maintainers:
+  - Hanna Hawa <hhhawa@amazon.com>
+  - Talel Shenhar <talel@amazon.com>, <talelshenhar@gmail.com>
+  - Ronen Krupnik <ronenk@amazon.com>
+
+properties:
+  compatible:
+    oneOf:
+      - description: Boards with Alpine V1 SoC
+        items:
+          - const: al,alpine
+
+      - description: Boards with Alpine V2 SoC
+        items:
+          - enum:
+              - al,alpine-v2-evp
+          - const: al,alpine-v2
+
+      - description: Boards with Alpine V3 SoC
+        items:
+          - enum:
+              - amazon,al-alpine-v3-evp
+          - const: amazon,al-alpine-v3
+
+additionalProperties: true
+
+...