phy: intel: Add driver support for ComboPhy

ComboPhy subsystem provides PHYs for various
controllers like PCIe, SATA and EMAC.

Signed-off-by: Dilip Kota <eswara.kota@linux.intel.com>
Acked-By: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/7b313826f46b9006a3ba98c0613e8f88f293a074.1589868358.git.eswara.kota@linux.intel.com


Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>