[PATCH] fsldma: use PCI Read Multiple command

[Liu Dave-R63238]

>> You are assuming the PCI memory space is prefetchable( no side effect)
>> for DMA.
>> Is it possible that DMA is from non-prefetchable memory space?

> This should be a safe assumption for this driver.  Remember, this
> driver just does offload memcpy, from one region to another.  So the
> PCI memory that you are reading from should be just a buffer of data,
> and there should be side-effect of reading it.

How about one FIFO buffer?

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