powerpc/pasemi: Clean up pasemi iommu table initializations
powerpc/pasemi: Clean up pasemi iommu table initializations

No need for empty helpers with iommu off, the ppc_md hooks are optional.

The direct_dma_ops are the default pci_dma_ops, so no need to set in the
them iommu off case.

No need to set the device tree device_node pci node iommu pointer, its
only used for dlpar remove.

Signed-off-by: Milton Miller <8bd50e0fc26e21e23b28837d9acdf866b237c39d@bga.com>
Signed-off-by: Nishanth Aravamudan <32d5d7104760c6969dbcc939b04e64f225673f91@us.ibm.com>
Acked-by: Olof Johansson <8c69ee23f3f44f8162a64d579c1fa25c2f55298a@lixom.net>
Signed-off-by: Benjamin Herrenschmidt <a7089bb6e7e92505d88aaff006cbdd60cc9120b6@kernel.crashing.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas