usb: dt-bindings: ti,twl6030-usb: convert to DT schema

Convert the legacy TXT binding for the TWL6030 USB module
to the modern YAML DT schema format. This adds formal validation
and improves documentation using a conditional schema.

The legacy twlxxxx-usb.txt file is no longer needed and is removed.

Signed-off-by: Jihed Chaibi <[e-mail]>
Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

Documentation/devicetree/bindings/usb/ti,twl6030-usb.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/ti,twl6030-usb.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments TWL6030 USB Comparator
+
+maintainers:
+  - Peter Ujfalusi <[e-mail]>
+
+description:
+  Bindings for the USB comparator module found within the TWL6030
+  family of companion chips.
+
+properties:
+  compatible:
+    const: ti,twl6030-usb
+
+  interrupts:
+    items:
+      - description: OTG for ID events in host mode
+      - description: USB device mode for VBUS events
+
+  usb-supply:
+    description:
+      Phandle to the VUSB regulator. For TWL6030, this should be the 'vusb'
+      regulator. For TWL6032 subclass, it should be the 'ldousb' regulator.
+
+required:
+  - compatible
+  - interrupts
+  - usb-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    usb {
+        compatible = "ti,twl6030-usb";
+
+        interrupts = <4 IRQ_TYPE_LEVEL_HIGH>, <10 IRQ_TYPE_LEVEL_HIGH>;
+        interrupt-parent = <&gic>;
+
+        usb-supply = <&reg_vusb>;
+    };

Documentation/devicetree/bindings/usb/twlxxxx-usb.txt

···
-USB COMPARATOR OF TWL CHIPS
-
-TWL6030 USB COMPARATOR
- - compatible : Should be "ti,twl6030-usb"
- - interrupts : Two interrupt numbers to the cpu should be specified. First
-   interrupt number is the otg interrupt number that raises ID interrupts when
-   the controller has to act as host and the second interrupt number is the
-   usb interrupt number that raises VBUS interrupts when the controller has to
-   act as device
- - usb-supply : phandle to the regulator device tree node. It should be vusb
-   if it is twl6030 or ldousb if it is twl6032 subclass.
-
-twl6030-usb {
-	compatible = "ti,twl6030-usb";
-	interrupts = < 4 10 >;
-};
-
-Board specific device node entry
-&twl6030-usb {
-	usb-supply = <&vusb>;
-};