Add Cygnus PCIe Serdes/PHY support

This patch series adds support for the Cygnus PCIe PHY

This patch series is based on Linux v4.3-rc1 and is avaliable in:
https://github.com/Broadcom/cygnus-linux/tree/cygnus-pcie...

Changes from v3:
 - Modify the driver to use child node to represent each PCIe PHY
 - Update device tree binding document and examples accordingly
 - Add owner filed in phy ops

Changes from v2:
 - Dropped MDC/MDIO bus driver since it's not needed to enable/disable the
   analog-front-end of the PCIe Serdes on Cygnus
 - Optimized delay waiting for PCIe analog-front-end to be fully enabled
 - Reduce the #phy-cell to 1 since now the MDIO PHY ID is not required

Changes from v1:
 - Move the MDC/MDIO bus driver from drivers/phy/* to drivers/bus/*
 - Make the PCIe PHY device node child node of the MDIO bus
 - Change the PCIe PHY driver to tristate so it can be compiled as a module
 - Other minor changes

Ray Jui (2):
  dt-bindings: Add Cygnus PCIe PHY binding doc
  phy: cygnus: pcie: Add Cygnus PCIe PHY support

 .../bindings/phy/brcm,cygnus-pcie-phy.txt          |  47 +++++
 drivers/phy/Kconfig                                |   9 +
 drivers/phy/Makefile                               |   1 +
 drivers/phy/phy-bcm-cygnus-pcie.c                  | 209 +++++++++++++++++++++
 4 files changed, 266 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/brcm,cygnus-pcie-phy.txt
 create mode 100644 drivers/phy/phy-bcm-cygnus-pcie.c

-- 
1.9.1

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