powerpc: mpc85xx: Update the condition to compile PCI routines

Compile the routines of mpc85xx/pci.c when both FSL_PCI_INIT
and DM_PCI are not enabled.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>