dt-bindings: timer: nxp,sysctr-timer: Add i.MX94 support

Add compatible string "nxp,imx94-sysctr-timer" for the i.MX94 chip, which
is backward compatible with i.MX95. Set it to fall back to
"nxp,imx95-sysctr-timer".

Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20250407151340.2779124-1-Frank.Li@nxp.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

Documentation/devicetree/bindings/timer/nxp,sysctr-timer.yaml

@@ -18,9 +18,14 @@ description: |
 
 properties:
   compatible:
-    enum:
-      - nxp,imx95-sysctr-timer
-      - nxp,sysctr-timer
+    oneOf:
+      - enum:
+          - nxp,imx95-sysctr-timer
+          - nxp,sysctr-timer
+      - items:
+          - enum:
+              - nxp,imx94-sysctr-timer
+          - const: nxp,imx95-sysctr-timer
 
   reg:
     maxItems: 1