Tune Slave DMA. RAID0 controller

[AzamatBeksadaev]

In RAID0 controller two DMAs are used. We can call them Master and Slave. Logic of Master DMA will not changed. It obtains block descriptors (BD*), extract system addresses, length of address range and deal with BD attributes. Slave DMA is going to be used BD shared from Master DMA. But both block descriptors from Master and Slave have to be controlled by RAID0 module. This allows modifying BD address and length parameters individually to each DMA module. Thus the fetching BDs, and controlling their attributes functions are disabled from Slave DMA. These tasks should be realised in that issue