powerpc/8xxx: Rework XES boards pci_init_board to use common FSL PCIe code

Remove duplicated code in MPC8xxx XES boards and utilize the common
fsl_pcie_init_board().

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
CC: Peter Tyser <ptyser@xes-inc.com>
5 files changed