pci/fsl_pci_init: Enable larger address and setting inbound windows properly

pci/fsl_pci_init: Enable larger address and setting inbound windows properly

* PCI Inbound window was setup incorrectly.  The PCI address and system
  address were swapped.  The PCI address should be setting piwar/piwbear
  and the system address should be setting pitar.

* Removed masking of addresses to allow for system address to support
  system address & PCI address >32-bits

* Set PIWBEAR & POTEAR to allow for full 64-bit PCI addresses

* Respect the PCI_REGION_PREFETCH for inbound windows

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Andrew Fleming-AFLEMING <afleming@freescale.com>