dt-bindings: interrupt-controller: Add SOPHGO CV1812H plic

Add compatible string for SOPHGO CV1812H plic.
Signed-off-by: Inochi Amaoto <inochiama@outlook.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Jisheng Zhang <jszhang@kernel.org>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>

Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml

@@ -66,6 +66,7 @@ properties:
           - enum:
               - allwinner,sun20i-d1-plic
               - sophgo,cv1800b-plic
+              - sophgo,cv1812h-plic
               - sophgo,sg2042-plic
               - thead,th1520-plic
           - const: thead,c900-plic