I2c Slave test: Qualcomm Technologies Inc Universal Peripheral.

Required properties:
 - compatible: Should be: "qcom,i2c-slave-test".
 - reg: Should contain slave address.

Optional property:

Example:

i2c_slave_test {
        compatible = "qcom,i2c-slave-test";
        reg = <0x64>;
        status = "ok";
};