dt-bindings: fsl-imx-sdma: Add I2C peripheral types ID

Add peripheral types ID 27 for I2C because sdma firmware (sdma-6q: v3.6,
sdma-7d: v4.6) support I2C DMA transfer.

Acked-by: Krzysztof Kozlowski <[e-mail]>
Signed-off-by: Frank Li <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Vinod Koul <[e-mail]>

Documentation/devicetree/bindings/dma/fsl,imx-sdma.yaml

···
           - SAI: 24
           - Multi SAI: 25
           - HDMI Audio: 26
+          - I2C: 27
 
        The third cell: transfer priority ID
          enum: