dt-bindings: arm: fsl: add i.MX93 11x11 FRDM board

Add DT compatible string for NXP i.MX93 11x11 FRDM board.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Signed-off-by: Fabian Pflug <f.pflug@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

Author: gumulka

Documentation/devicetree/bindings/arm/fsl.yaml

@@ -1420,6 +1420,7 @@ properties:
           - enum:
               - fsl,imx93-9x9-qsb         # i.MX93 9x9 QSB Board
               - fsl,imx93-11x11-evk       # i.MX93 11x11 EVK Board
+              - fsl,imx93-11x11-frdm      # i.MX93 11x11 FRDM Board
               - fsl,imx93-14x14-evk       # i.MX93 14x14 EVK Board
           - const: fsl,imx93