dt-bindings: clock: milbeaut: Drop providers and consumers from example

Convention for examples is to only show what's covered by the binding,
so drop the consumer "socionext,milbeaut-usio-uart" and input clock
provider "fixed-clock" from the example. "socionext,milbeaut-usio-uart"
is also not documented by a schema which caused a warning.

Signed-off-by: Rob Herring (Arm) <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Signed-off-by: Stephen Boyd <[e-mail]>

Documentation/devicetree/bindings/clock/milbeaut-clock.yaml

···
 additionalProperties: false
 
 examples:
-  # Clock controller node:
   - |
-    m10v-clk-ctrl@1d021000 {
+    clock-controller@1d021000 {
         compatible = "socionext,milbeaut-m10v-ccu";
         reg = <0x1d021000 0x4000>;
         #clock-cells = <1>;
         clocks = <&clki40mhz>;
     };
-
-  # Required an external clock for Clock controller node:
-  - |
-    clocks {
-        clki40mhz: clki40mhz {
-            compatible = "fixed-clock";
-            #clock-cells = <0>;
-            clock-frequency = <40000000>;
-        };
-        /* other clocks */
-    };
-
-  # The clock consumer shall specify the desired clock-output of the clock
-  # controller as below by specifying output-id in its "clk" phandle cell.
-  # 2: uart
-  # 4: 32-bit timer
-  # 7: UHS-I/II
-  - |
-    serial@1e700010 {
-        compatible = "socionext,milbeaut-usio-uart";
-        reg = <0x1e700010 0x10>;
-        interrupts = <0 141 0x4>, <0 149 0x4>;
-        interrupt-names = "rx", "tx";
-        clocks = <&clk 2>;
-    };
-
 ...