dt-bindings: clock: convert bcm2835-aux-clock to yaml

Convert the DT binding document for BCM2835 auxiliary peripheral clock
from .txt to YAML.

Signed-off-by: Stefan Wahren <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Acked-by: Conor Dooley <[e-mail]>
[[e-mail]: Drop aux label]
Signed-off-by: Stephen Boyd <[e-mail]>

Documentation/devicetree/bindings/clock/brcm,bcm2835-aux-clock.txt

···
-Broadcom BCM2835 auxiliary peripheral support
-
-This binding uses the common clock binding:
-    Documentation/devicetree/bindings/clock/clock-bindings.txt
-
-The auxiliary peripherals (UART, SPI1, and SPI2) have a small register
-area controlling clock gating to the peripherals, and providing an IRQ
-status register.
-
-Required properties:
-- compatible:	Should be "brcm,bcm2835-aux"
-- #clock-cells:	Should be <1>. The permitted clock-specifier values can be
-		  found in include/dt-bindings/clock/bcm2835-aux.h
-- reg:		Specifies base physical address and size of the registers
-- clocks:	The parent clock phandle
-
-Example:
-
-	clocks: cprman@7e101000 {
-		compatible = "brcm,bcm2835-cprman";
-		#clock-cells = <1>;
-		reg = <0x7e101000 0x2000>;
-		clocks = <&clk_osc>;
-	};
-
-	aux: aux@7e215004 {
-		compatible = "brcm,bcm2835-aux";
-		#clock-cells = <1>;
-		reg = <0x7e215000 0x8>;
-		clocks = <&clocks BCM2835_CLOCK_VPU>;
-	};

Documentation/devicetree/bindings/clock/brcm,bcm2835-aux-clock.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/brcm,bcm2835-aux-clock.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom BCM2835 auxiliary peripheral clock
+
+maintainers:
+  - Stefan Wahren <[e-mail]>
+  - Raspberry Pi Kernel Maintenance <[e-mail]>
+
+description:
+  The auxiliary peripherals (UART, SPI1, and SPI2) have a small register
+  area controlling clock gating to the peripherals, and providing an IRQ
+  status register.
+
+properties:
+  compatible:
+    const: brcm,bcm2835-aux
+
+  reg:
+    maxItems: 1
+
+  "#clock-cells":
+    const: 1
+
+  clocks:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - "#clock-cells"
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/bcm2835.h>
+    clock@7e215000 {
+        compatible = "brcm,bcm2835-aux";
+        reg = <0x7e215000 0x8>;
+        #clock-cells = <1>;
+        clocks = <&clocks BCM2835_CLOCK_VPU>;
+    };