tests: drivers: Add RT1715 driver

Add a build test to verify richtek,rt1715 driver builds correctly.

Signed-off-by: Jianxiong Gu <[email protected]>

Author: recalci

tests/drivers/build_all/usb/i2c_devices.overlay

@@ -36,6 +36,14 @@
 				reg = <1>;
 				irq-gpios = <&test_gpio 0 0>;
 			};
+
+			test_i2c_rt1715: rt1715@2 {
+				compatible = "richtek,rt1715";
+				reg = <2>;
+				irq-gpios = <&test_gpio 0 0>;
+				vconn-ctrl-gpios = <&test_gpio 0 0>;
+				vconn-disc-gpios = <&test_gpio 0 0>;
+			};
 		};
 	};
 };