INA226::init Restored return OK in trigger mode

Restore return state that was lost in e4926373e6

src/drivers/power_monitor/ina226/ina226.cpp

@@ -314,6 +314,9 @@ INA226::init()
 
 	if (!_mode_trigged) {
 		ret = write(INA226_REG_CONFIGURATION, _config);
+
+	} else {
+		ret = OK;
 	}
 
 	set_device_address(INA226_BASEADDR);	/* set I2c Address */