* Qualcomm Technologies Inc Universal Flash Storage (UFS) PHY

UFSPHY nodes are defined to describe on-chip UFS PHY hardware macro.
Each UFS PHY node should have its own node.

To bind UFS PHY with UFS host controller, the controller node should
contain a phandle reference to UFS PHY node.

Required properties:
- compatible        : compatible list, contains "qcom,ufs-phy-qmp-20nm"
		      or "qcom,ufs-phy-qmp-14nm" or "qcom,ufs-phy-qmp-v3"
		      or "qcom,ufs-phy-qrbtc-v2" according to the relevant phy in use.
- reg               : should contain PHY register address space (mandatory),
- reg-names         : indicates various resources passed to driver (via reg proptery) by name.
                      Required "reg-names" is "phy_mem".
- #phy-cells        : This property shall be set to 0
- vdda-phy-supply   : phandle to main PHY supply for analog domain
- vdda-pll-supply   : phandle to PHY PLL and Power-Gen block power supply
- clocks	    : List of phandle and clock specifier pairs
- clock-names       : List of clock input name strings sorted in the same
		      order as the clocks property. "ref_clk_src", "ref_clk",
		      "tx_iface_clk" & "rx_iface_clk" are mandatory but
		      "ref_clk_parent" is optional

Optional properties:
- vdda-phy-max-microamp : specifies max. load that can be drawn from phy supply
- vdda-pll-max-microamp : specifies max. load that can be drawn from pll supply
- vddp-ref-clk-supply   : phandle to UFS device ref_clk pad power supply
- vddp-ref-clk-max-microamp : specifies max. load that can be drawn from this supply
- vddp-ref-clk-always-on : specifies if this supply needs to be kept always on

Example:

	ufsphy1: ufsphy@0xfc597000 {
		compatible = "qcom,ufs-phy-qmp-20nm";
		reg = <0xfc597000 0x800>;
		reg-names = "phy_mem";
		#phy-cells = <0>;
		vdda-phy-supply = <&pma8084_l4>;
		vdda-pll-supply = <&pma8084_l12>;
		vdda-phy-max-microamp = <50000>;
		vdda-pll-max-microamp = <1000>;
		clock-names = "ref_clk_src",
			"ref_clk_parent",
			"ref_clk",
			"tx_iface_clk",
			"rx_iface_clk";
		clocks = <&clock_rpm clk_ln_bb_clk>,
			<&clock_gcc clk_pcie_1_phy_ldo >,
			<&clock_gcc clk_ufs_phy_ldo>,
			<&clock_gcc clk_gcc_ufs_tx_cfg_clk>,
			<&clock_gcc clk_gcc_ufs_rx_cfg_clk>;
	};

	ufshc@0xfc598000 {
		...
		phys = <&ufsphy1>;
	};