powerpc/86xx: Rename PCI1/2 to PCIE1/2 on MPC8641HPCN & SBC8641

The MPC8641 boards actually only have PCIE not PCI.  Rename so we are
uniform with regards to names so we can replace this code with templated
code.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
6 files changed