dt-bindings: i2c: imx-lpi2c: Add imx8ulp compatible string

Add the compatible for i.MX8ULP.
Reviewed-by: Dong Aisheng <aisheng.dong@nxp.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jacky Bai <ping.bai@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

Documentation/devicetree/bindings/i2c/i2c-imx-lpi2c.yaml

@@ -22,6 +22,7 @@ properties:
               - fsl,imx8qxp-lpi2c
               - fsl,imx8dxl-lpi2c
               - fsl,imx8qm-lpi2c
+              - fsl,imx8ulp-lpi2c
           - const: fsl,imx7ulp-lpi2c
 
   reg: