dma/dpaa: introduce DPAA DMA driver skeleton

The DPAA DMA driver is an implementation of the dmadev APIs,
that provide means to initiate a DMA transaction from CPU.
The initiated DMA is performed w

dma/dpaa: introduce DPAA DMA driver skeleton

The DPAA DMA driver is an implementation of the dmadev APIs,
that provide means to initiate a DMA transaction from CPU.
The initiated DMA is performed without CPU being involved
in the actual DMA transaction. This is achieved via using
the QDMA controller of DPAA SoC.

Signed-off-by: Gagandeep Singh <[email protected]>

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