ASoC: dt-bindings: fsl-sai: Reinstate i.MX93 SAI compatible string

The ASoC: dt-bindings: fsl-sai: Fix mx6ul and mx7d compatible strings
dropped i.MX93 SAI compatible string, reinstate it.

Fixes: 81b6c043 ("ASoC: dt-bindings: fsl-sai: Fix mx6ul and mx7d compatible strings")
Signed-off-by: Marek Vasut <marex@denx.de>
Link: https://lore.kernel.org/r/20221208035354.255438-1-marex@denx.deSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/fsl,sai.yaml

@@ -38,6 +38,7 @@ properties:
               - fsl,imx8mq-sai
               - fsl,imx8qm-sai
               - fsl,imx8ulp-sai
+              - fsl,imx93-sai
               - fsl,vf610-sai
 
   reg: