[PATCH V4 0/3] PCI patch set description

[Jia Hongtao]

The first patch fixed a kernel panic when scanning PCI bus if it is working
in agent mode.

In later two patches we unified PCI initialization code by changing fsl_pci
to a platform drvier. The approach will affect swiotlb init and this issue
is addressed in the second patch.

We now just convet IBM 44x, MPC85xxDS and QEMU to this new mechanism. All
other boards will be coverted if this patch set is accepted.