dt-bindings: clock: Add a missing include to MMP Audio Clock binding

The include file for input clock in the example was missing, breaking the
validation.

Signed-off-by: Lubomir Rintel <[email protected]>
Reported-by: Rob Herring <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Acked-by: Rob Herring <[email protected]>
Signed-off-by: Stephen Boyd <[email protected]>

Author: lkundrak

Documentation/devicetree/bindings/clock/marvell,mmp2-audio-clock.yaml

@@ -59,6 +59,7 @@ additionalProperties: false
 examples:
   - |
     #include <dt-bindings/clock/marvell,mmp2-audio.h>
+    #include <dt-bindings/clock/marvell,mmp2.h>
     #include <dt-bindings/power/marvell,mmp2.h>
 
     clock-controller@d42a0c30 {