Merge "serial: msm_geni_serial: Add 4-wire UART functionality" into msm-4.9

Optional properties:

- qcom,bus-mas: contains the bus master id needed to put in bus bandwidth votes

		for inter-connect buses.

- qcom,wakeup-byte: Byte to be injected in the tty layer during wakeup isr.

Example:

qupv3_uart11: qcom,qup_uart@0xa88000 {

	pinctrl-1 = <&qup_1_uart_3_sleep>;

	interrupts = <0 355 0>;

	qcom,bus-mas = <MASTER_BLSP_2>;

	qcom,wakeup-byte = <0xFF>;

};