raw/ioat: add data path for idxd device

raw/ioat: add data path for idxd device

Add support for doing copies using DSA hardware. This is implemented by
just switching on the device type field at the start of the inline
functions. Since there is no hardware which will have both device types
present this branch will always be predictable after the first call,
meaning it has little to no perf penalty.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Reviewed-by: Kevin Laatz <kevin.laatz@intel.com>
Acked-by: Radu Nicolau <radu.nicolau@intel.com>