dt-bindings: arm: fsl: add Variscite DART-MX95 Boards

Add DT compatible strings for Variscite DART-MX95 SoM and Variscite
development carrier Board.

Link: https://variscite.com/system-on-module-som/i-mx-9/dart-mx95/
Link: https://variscite.com/carrier-boards/sonata-board/
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Stefano Radaelli <stefano.r@variscite.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>

Author: StefanoRadaelliVar

Documentation/devicetree/bindings/arm/fsl.yaml

@@ -1477,6 +1477,12 @@ properties:
           - const: toradex,smarc-imx95     # Toradex SMARC iMX95 Module
           - const: fsl,imx95
 
+      - description: Variscite DART-MX95 based Boards
+        items:
+          - const: variscite,var-dart-mx95-sonata # Variscite DART-MX95 SOM on Sonata Development Board
+          - const: variscite,var-dart-mx95 # Variscite DART-MX95 SOM
+          - const: fsl,imx95
+
       - description: i.MXRT1050 based Boards
         items:
           - enum: