dt-bindings: arm: fsl: Add compatible for i.MX95 15x15 FRDM board

Introduce a new DT compatible string for the NXP i.MX95 15x15 FRDM
development board, a compact and cost-effective platform based on
the i.MX95 applications processor.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Reviewed-by: Laurentiu Mihalcea <laurentiu.mihalcea@nxp.com>
Signed-off-by: Lei Xu <lei.xu@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

Author: nxp-xl

Documentation/devicetree/bindings/arm/fsl.yaml

@@ -1446,6 +1446,7 @@ properties:
         items:
           - enum:
               - fsl,imx95-15x15-evk       # i.MX95 15x15 EVK Board
+              - fsl,imx95-15x15-frdm      # i.MX95 15x15 FRDM Board
               - fsl,imx95-19x19-evk       # i.MX95 19x19 EVK Board
               - toradex,verdin-imx95-19x19-evk  # i.MX95 Verdin Evaluation Kit (EVK)
           - const: fsl,imx95