powerpc/powernv: Add a page size parameter to pnv_pci_setup_iommu_table()

Since a TCE page size can be other than 4K, make it configurable for
P5IOC2 and IODA PHBs.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --cc arch/powerpc/platforms/powernv/pci-ioda.c
Simple merge

diff --cc arch/powerpc/platforms/powernv/pci-p5ioc2.c
Simple merge

diff --cc arch/powerpc/platforms/powernv/pci.c
Simple merge

diff --cc arch/powerpc/platforms/powernv/pci.h
Simple merge