Tegra SoC SATA AHCI controller

Required properties :
- compatible : Must be one of:
  - Tegra124 : "nvidia,tegra124-ahci"
  - Tegra132 : "nvidia,tegra132-ahci", "nvidia,tegra124-ahci"
  - Tegra210 : "nvidia,tegra210-ahci"
- reg : Should contain 2 entries:
  - AHCI register set (SATA BAR5)
  - SATA register set
- interrupts : Defines the interrupt used by SATA
- clocks : Must contain an entry for each entry in clock-names.
  See ../clocks/clock-bindings.txt for details.
- clock-names : Must include the following entries:
  - sata
  - sata-oob
- resets : Must contain an entry for each entry in reset-names.
  See ../reset/reset.txt for details.
- reset-names : Must include the following entries:
  - sata
  - sata-oob
  - sata-cold
- phys : Must contain an entry for each entry in phy-names.
  See ../phy/phy-bindings.txt for details.
- phy-names : Must include the following entries:
  - For Tegra124 and Tegra132:
    - sata-phy : XUSB PADCTL SATA PHY
- For Tegra124 and Tegra132:
  - hvdd-supply : Defines the SATA HVDD regulator
  - vddio-supply : Defines the SATA VDDIO regulator
  - avdd-supply : Defines the SATA AVDD regulator
  - target-5v-supply : Defines the SATA 5V power regulator
  - target-12v-supply : Defines the SATA 12V power regulator

Optional properties:
- reg :
  - AUX register set
- clock-names :
  - cml1 :
    cml1 clock should be defined here if the PHY driver
    doesn't manage them. If it does, they should not be.
- phy-names :
  - For T210:
    - sata-phy
