dt-bindings: i2c: dw: Add Sophgo SG2044 SoC I2C controller

Add compatible string for Sophgo SG2044 SoC I2C controller which can be
used specifically for the SG2044 SoC.

Signed-off-by: Inochi Amaoto <[e-mail]>
Acked-by: Krzysztof Kozlowski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Andi Shyti <[e-mail]>

Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml

···
       - items:
           - enum:
               - mscc,ocelot-i2c
+              - sophgo,sg2044-i2c
               - thead,th1520-i2c
           - const: snps,designware-i2c