dt-bindings: clock: samsung: convert Exynos3250 to dtschema

Merge Exynos3250 clock controller bindings to existing DT schema.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210825134056.219884-5-krzysztof.kozlowski@canonical.comSigned-off-by: Stephen Boyd <sboyd@kernel.org>

Documentation/devicetree/bindings/clock/exynos3250-clock.txt

-* Samsung Exynos3250 Clock Controller
-
-The Exynos3250 clock controller generates and supplies clock to various
-controllers within the Exynos3250 SoC.
-
-Required Properties:
-
-- compatible: should be one of the following.
-  - "samsung,exynos3250-cmu" - controller compatible with Exynos3250 SoC.
-  - "samsung,exynos3250-cmu-dmc" - controller compatible with
-    Exynos3250 SoC for Dynamic Memory Controller domain.
-  - "samsung,exynos3250-cmu-isp" - ISP block clock controller compatible
-     with Exynos3250 SOC
-
-- reg: physical base address of the controller and length of memory mapped
-  region.
-
-- #clock-cells: should be 1.
-
-Each clock is assigned an identifier and client nodes can use this identifier
-to specify the clock which they consume.
-
-All available clocks are defined as preprocessor macros in
-dt-bindings/clock/exynos3250.h header and can be used in device
-tree sources.
-
-Example 1: Examples of clock controller nodes are listed below.
-
-	cmu: clock-controller@10030000 {
-		compatible = "samsung,exynos3250-cmu";
-		reg = <0x10030000 0x20000>;
-		#clock-cells = <1>;
-	};
-
-	cmu_dmc: clock-controller@105c0000 {
-		compatible = "samsung,exynos3250-cmu-dmc";
-		reg = <0x105C0000 0x2000>;
-		#clock-cells = <1>;
-	};
-
-	cmu_isp: clock-controller@10048000 {
-		compatible = "samsung,exynos3250-cmu-isp";
-		reg = <0x10048000 0x1000>;
-		#clock-cells = <1>;
-	};
-
-Example 2: UART controller node that consumes the clock generated by the clock
-	   controller. Refer to the standard clock bindings for information
-	   about 'clocks' and 'clock-names' property.
-
-	serial@13800000 {
-		compatible = "samsung,exynos4210-uart";
-		reg = <0x13800000 0x100>;
-		interrupts = <0 109 0>;
-		clocks = <&cmu CLK_UART0>, <&cmu CLK_SCLK_UART0>;
-		clock-names = "uart", "clk_uart_baud0";
-	};

Documentation/devicetree/bindings/clock/samsung,exynos-clock.yaml

@@ -20,6 +20,9 @@ properties:
   compatible:
     oneOf:
       - enum:
+          - samsung,exynos3250-cmu
+          - samsung,exynos3250-cmu-dmc
+          - samsung,exynos3250-cmu-isp
           - samsung,exynos5250-clock
       - items:
           - enum: