Marvell/Library: ComPhyLib: Get AHCI data with MARVELL_BOARD_DESC

ComPhy Library used to get Armada7k8k AHCI/SDMMC/XHCI controller
description from hardcoded values stored in the header file
MvHwDescLib.h. As a result it is very hard to support other
Armada SoC families with this library.

This patch updates the driver to get AHCI controller
description from newly introduced MARVELL_BOARD_DESC protocol,
and removes the dependency on the hardcoded structures.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Marcin Wojtas <mw@semihalf.com>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>