dt-bindings: clock: stm32mp1: adapt example for "st,stm32mp1-rcc-secure"

For "st,stm32mp1-rcc-secure" schema, clocks and clock-names entries are now
required properties.

Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220511092559.4952-1-alexandre.torgue@foss.st.com'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Author: Alexandre Torgue

Documentation/devicetree/bindings/clock/st,stm32mp1-rcc.yaml

@@ -106,10 +106,17 @@ additionalProperties: false
 
 examples:
   - |
+    #include <dt-bindings/clock/stm32mp1-clks.h>
     rcc: rcc@50000000 {
         compatible = "st,stm32mp1-rcc-secure", "syscon";
         reg = <0x50000000 0x1000>;
         #clock-cells = <1>;
         #reset-cells = <1>;
+        clock-names = "hse", "hsi", "csi", "lse", "lsi";
+        clocks = <&scmi_clk CK_SCMI_HSE>,
+                 <&scmi_clk CK_SCMI_HSI>,
+                 <&scmi_clk CK_SCMI_CSI>,
+                 <&scmi_clk CK_SCMI_LSE>,
+                 <&scmi_clk CK_SCMI_LSI>;
     };
 ...