Squashed 'dts/upstream/' content from commit aaba2d45dc2a

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diff --git a/Bindings/arm/arm,versatile-sysreg.yaml b/Bindings/arm/arm,versatile-sysreg.yaml
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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/arm,versatile-sysreg.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Arm Versatile system registers
+
+maintainers:
+  - Linus Walleij <linus.walleij@linaro.org>
+
+description:
+  This is a system control registers block, providing multiple low level
+  platform functions like board detection and identification, software
+  interrupt generation, MMC and NOR Flash control, etc.
+
+properties:
+  compatible:
+    items:
+      - const: arm,versatile-sysreg
+      - const: syscon
+      - const: simple-mfd
+
+  reg:
+    maxItems: 1
+
+  panel:
+    type: object
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+...