Tegra124 SoC SATA AHCI controller

Required properties :
- compatible : For Tegra124, must contain "nvidia,tegra124-ahci".  Otherwise,
  must contain '"nvidia,<chip>-ahci", "nvidia,tegra124-ahci"', where <chip>
  is tegra132.
- 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
  - cml1
  - pll_e
- resets : Must contain an entry for each entry in reset-names.
  - pll_e
  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:
  - sata-phy : XUSB PADCTL SATA PHY
- target-5v-supply : Defines the SATA 5V power regulator
- target-12v-supply : Defines the SATA 12V power regulator
- nvidia,disable-features : Defines features to be disabled
 - devslp
 - hipm
 - dipm
 - slumber
 - partial
 - ncq
- nvidia,link-flags : Defines link flags
 - max_power
 - min_power
 - med_power
- pinctrl-names : Define pinctrls for devslp pin
 - pinctrl-0: the pincontrol settings to configure devslp pin
 - pinctrl-1: the pincontrol settings to place devslp pin in pull up state