This reverts commit 51d65880.

Smart connects seem to work fine now

This reverts commit 21ccfa78.

Is not stable right now so will revert back to classic interconnects.

This reverts commit 5fc85b65.

    - Maintaining the DualDMA and BlueDMA codepaths is tedious
    - DualDMA did not receive any maintenance for a long time and is
    lacking features such as work queues and parallel reads/write
    - Performance was also worse overall
    - Only advantage is a somewhat smaller LUT footprint, but that seems
    unimportant on the large devices we use for PCIe right now

    - Currently only one buffer per direction is used as there is a
    problem with lost interrupts
    - The interrupts are lost when there is concurrent DMA and MSIx PCIe
    traffic

    - Otherwise the Platform can not match interrupt and PE
    - Only one interrupt per PE is allowed
    - Mapping could be moved into status core as suggested in #166