uboot-imx

arm: mvebu: db-88f6820-gp: Enable PCI support

This patch enabled the MVEBU PCIe support on the db-88f6820-gp A38x
eval board. It also enabled the Intel E1000 driver support and
adds the initialization of PCIe network controllers to the
board code.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Anton Schubert <anton.schubert@gmx.de>
Cc: Luka Perkov <luka.perkov@sartura.hr>
Cc: Dirk Eibach <eibach@gdsys.de>