flounder: merging rpc client with a binding layer

Signed-off-by: Adam Turowski <adam.turowski@inf.ethz.ch>

Added: new error numbers to xeon phi.

Adapted the Xeon Phi driver to make use of the DMA driver library

flounder txqueue: bugfix in the sendqueue

Messed up queue order i.e. tail==head with queuecount = 2

Added: Debuging switches with additional assertions and debug output

Fix: continuation always called with queue.head instead of msg_st
Fix: send handlers now return an error value of the send attempt outcome
Fix: try send does check for return value and registers on TX_BUSY

libdma: added stubbs for Xeon Phi DMA Driver

libdma: refactoring of driver client as a "virtual" dma device

The DMA clients are now acting as a "normal" dma device where the
requests are forwared to the DMA driver service domain instead of
serving locally. The client initializes a DMA device by service name,
iref or supported memory range.

Extended the DMA manager to serve iref based queries.

Several generalizations of some device/channel functions to handle the
requests and forward them to the specific functions.

Adapted the dma_test domain to use the new interface.

libdma/ioat driver: Refactoration of some flounder message queue to use the generic implementation.

LIBDMA: Missing implementation for glueing request handling and device management to gether. Various bugfixes.

LIBDMA: DMA Client implementation

LIBDMA: added implementation for handling flounder messages + attempt for tx queue.

LIB DMA: service implementation

Added a stubbed implementation for the DMA service.
Removed the stop functionality from the interface
Rearranged the ID type defs of libdma to dma.h

Added: Stubbs for generic DMA library (service and client)