arm64: a37xx: pci: add support for aardvark pcie driver

arm64: a37xx: pci: add support for aardvark pcie driver

This patch introduced the Aardvark PCIe driver based
driver model.
The PCIe driver is supposed to work in Root Complex
mode. It only supports X1 lane width.

Signed-off-by: Wilson Ding <[email protected]>
Reviewed-on: http://vgitil04.il.marvell.com:8080/38725
Reviewed-by: Victor Gu <[email protected]>
Reviewed-by: Hua Jing <[email protected]>
Tested-by: Hua Jing <[email protected]>
Cc: Simon Glass <[email protected]>
Cc: Stefan Roese <[email protected]>
Signed-off-by: Ken Ma <[email protected]>
Signed-off-by: Stefan Roese <[email protected]>