arm64: dts: meson: gxl: add i2c C pins

Add the DV18 and DV19 pinmux setting for the i2c C of the gxl family
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

arch/arm64/boot/dts/amlogic/meson-gxl.dtsi

@@ -533,6 +533,15 @@ mux {
 			};
 		};
 
+		i2c_c_dv18_pins: i2c_c_dv18 {
+			mux {
+				groups = "i2c_sck_c_dv19",
+				      "i2c_sda_c_dv18";
+				function = "i2c_c";
+				bias-disable;
+			};
+		};
+
 		eth_pins: eth_c {
 			mux {
 				groups = "eth_mdio",