dt-bindings: phy: Convert PXA1928 USB/HSIC PHY to DT schema

Convert the binding for the Marvell PXA1928 USB and HSIC PHYs from TXT
to DT schema.
Signed-off-by: Duje Mihanović <duje.mihanovic@skole.hr>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20231004-pxa1928-usb-yaml-v3-1-150c9ef3ab9d@skole.hrSigned-off-by: Vinod Koul <vkoul@kernel.org>

Documentation/devicetree/bindings/phy/marvell,pxa1928-usb-phy.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/marvell,pxa1928-usb-phy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Marvell PXA1928 USB/HSIC PHY
+
+maintainers:
+  - Duje Mihanović <duje.mihanovic@skole.hr>
+
+properties:
+  compatible:
+    enum:
+      - marvell,pxa1928-usb-phy
+      - marvell,pxa1928-hsic-phy
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  '#phy-cells':
+    const: 0
+
+  resets:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - '#phy-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/marvell,pxa1928.h>
+
+    usbphy: phy@7000 {
+        compatible = "marvell,pxa1928-usb-phy";
+        reg = <0x7000 0xe0>;
+        clocks = <&apmu PXA1928_CLK_USB>;
+        #phy-cells = <0>;
+    };

Documentation/devicetree/bindings/phy/pxa1928-usb-phy.txt

-* Marvell PXA1928 USB and HSIC PHYs
-
-Required properties:
-- compatible: "marvell,pxa1928-usb-phy" or "marvell,pxa1928-hsic-phy"
-- reg: base address and length of the registers
-- clocks - A single clock. From common clock binding.
-- #phys-cells: should be 0. From common phy binding.
-- resets: reference to the reset controller
-
-Example:
-
-	usbphy: phy@7000 {
-		compatible = "marvell,pxa1928-usb-phy";
-		reg = <0x7000 0xe0>;
-		clocks = <&apmu_clocks PXA1928_CLK_USB>;
-		#phy-cells = <0>;
-	};
-