ARM: SoC driver changes for 3.17

A handful of driver-related changes. We've had a bunch of them going in through
other branches as well, so it's only a part of what we really have this release.

Larger pieces are:

* Removal of a now unused PWM driver for atmel
  - This includes AVR32 changes that have been appropriately acked.
* Performance counter support for the arm CCN interconnect
* OMAP mailbox driver cleanups and consolidation
* PCI and SATA PHY drivers for SPEAr 13xx platforms
* Redefinition (with backwards compatibility!) of PCI DT bindings for Tegra to
  better model regulators/power.
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