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 <daniel.machon@microchip.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20240916-lan969x-clock-v1-1-0e150336074d@microchip.com
Signed-off-by: Claudiu Beznea <claudiu.beznea@tuxon.dev>

Author: Danielmachon

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

@@ -16,7 +16,18 @@ description: |
 
 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