dt-bindings: clock: cirrus,cs2000-cp: Document CS2500

Document backward compatibility support for the CS2500 chip, which is a
drop-in replacement for the CS2000 chip.

Acked-by: Conor Dooley <conor.dooley@microchip.com>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260504144534.43745-4-marek.vasut+renesas@mailbox.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

Author: Marek Vasut

Documentation/devicetree/bindings/clock/cirrus,cs2000-cp.yaml

@@ -11,14 +11,19 @@ maintainers:
 
 description: |
   The CS2000-CP is an extremely versatile system clocking device that
-  utilizes a programmable phase lock loop.
+  utilizes a programmable phase lock loop. CS2500 is a compatible
+  drop-in replacement for CS2000-CP.
 
   Link: https://www.cirrus.com/products/cs2000/
+  Link: https://www.cirrus.com/products/cs2500/
 
 properties:
   compatible:
-    enum:
-      - cirrus,cs2000-cp
+    oneOf:
+      - items:
+          - const: cirrus,cs2500
+          - const: cirrus,cs2000-cp
+      - const: cirrus,cs2000-cp
 
   clocks:
     description: