dt-bindings: reset: Convert Broadcom STB reset to YAML

Convert the Broadcom STB SW_INIT style reset controller binding to YAML.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Link: https://lore.kernel.org/r/20211208003727.3596577-3-f.fainelli@gmail.comSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/reset/brcm,brcmstb-reset.txt

-Broadcom STB SW_INIT-style reset controller
-===========================================
-
-Broadcom STB SoCs have a SW_INIT-style reset controller with separate
-SET/CLEAR/STATUS registers and possibly multiple banks, each of 32 bit
-reset lines.
-
-Please also refer to reset.txt in this directory for common reset
-controller binding usage.
-
-Required properties:
-- compatible: should be brcm,brcmstb-reset
-- reg: register base and length
-- #reset-cells: must be set to 1
-
-Example:
-
-	reset: reset-controller@8404318 {
-		compatible = "brcm,brcmstb-reset";
-		reg = <0x8404318 0x30>;
-		#reset-cells = <1>;
-	};
-
-	&ethernet_switch {
-		resets = <&reset 26>;
-		reset-names = "switch";
-	};

Documentation/devicetree/bindings/reset/brcm,brcmstb-reset.yaml

+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/reset/brcm,brcmstb-reset.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Broadcom STB SW_INIT-style reset controller
+
+description:
+  Broadcom STB SoCs have a SW_INIT-style reset controller with separate
+  SET/CLEAR/STATUS registers and possibly multiple banks, each of 32 bit
+  reset lines.
+
+  Please also refer to reset.txt in this directory for common reset
+  controller binding usage.
+
+maintainers:
+  - Florian Fainelli <f.fainelli@gmail.com>
+
+properties:
+  compatible:
+    const: brcm,brcmstb-reset
+
+  reg:
+    maxItems: 1
+
+  "#reset-cells":
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - "#reset-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    reset: reset-controller@8404318 {
+      compatible = "brcm,brcmstb-reset";
+      reg = <0x8404318 0x30>;
+      #reset-cells = <1>;
+    };
+
+    ethernet_switch {
+      resets = <&reset 26>;
+      reset-names = "switch";
+    };