dt-bindings: clock: add support for lan969x

Lan969x is going to reuse the existing lan966x clock driver - document
that by adding compatible strings for the different SKU's that we
support.

Signed-off-by: Daniel Machon <[e-mail]>
Acked-by: Conor Dooley <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Claudiu Beznea <[e-mail]>

Documentation/devicetree/bindings/clock/microchip,lan966x-gck.yaml

···
 
 properties:
   compatible:
-    const: microchip,lan966x-gck
+    oneOf:
+      - enum:
+          - microchip,lan966x-gck
+          - microchip,lan9691-gck
+      - items:
+          - enum:
+              - microchip,lan9698-gck
+              - microchip,lan9696-gck
+              - microchip,lan9694-gck
+              - microchip,lan9693-gck
+              - microchip,lan9692-gck
+          - const: microchip,lan9691-gck
 
   reg:
     minItems: 1