* Qualcomm MSM CSI Phy

Required properties:
- cell-index: csi phy hardware core index
- compatible :
    - "qcom,csiphy"
    - "qcom,csiphy-v2.0"
    - "qcom,csiphy-v2.2"
    - "qcom,csiphy-v3.0"
    - "qcom,csiphy-v3.1"
    - "qcom,csiphy-v3.1.1"
    - "qcom,csiphy-v3.2"
    - "qcom,csiphy-v3.4.2"
    - "qcom,csiphy-v3.5"
- reg : offset and length of the register set for the device
    for the csiphy operating in compatible mode.
- reg-names : should specify relevant names to each reg property defined.
- interrupts : should contain the csiphy interrupt.
- interrupt-names : should specify relevant names to each interrupts
  property defined.
- clock-names: name of the clocks required for the device
- qcom,clock-rates: clock rate in Hz
	- 0 if appropriate clock is required but doesn't have to apply the rate

Example:

   qcom,csiphy@fda0ac00 {
       cell-index = <0>;
       compatible = "qcom,csiphy-v2.0", "qcom,csiphy";
       reg = <0xfda0ac00 0x200>;
       reg-names = "csiphy";
       interrupts = <0 78 0>;
       interrupt-names = "csiphy";
       clock-names = "camss_top_ahb_clk",
                "ispif_ahb_clk", "csiphy_timer_src_clk",
                "csiphy_timer_clk";
       qcom,clock-rates = <0 0 200000000 0>;
   };