spi: dt-bindings: lpspi: add i.MX93 compatible

Add i.MX93 LPSPI compatible
Signed-off-by: NPeng Fan <peng.fan@nxp.com>
Acked-by: NKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220812073452.45763-2-peng.fan@oss.nxp.comSigned-off-by: NMark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml

@@ -19,7 +19,9 @@ properties:
           - fsl,imx7ulp-spi
           - fsl,imx8qxp-spi
       - items:
-          - const: fsl,imx8ulp-spi
+          - enum:
+              - fsl,imx8ulp-spi
+              - fsl,imx93-spi
           - const: fsl,imx7ulp-spi
   reg:
     maxItems: 1