lib dma: fixed xeon phi case when not using HW model

Signed-off-by: Roni Häcki <roni.haecki@inf.ethz.ch>

libdma: use libdriverkit for memory management

Signed-off-by: Reto Achermann <reto.achermann@inf.ethz.ch>

dma: towards support for IOMMUs

Signed-off-by: Reto Achermann <reto.achermann@inf.ethz.ch>

Always use frame_identify() instead of raw invocation

Signed-off-by: Simon Gerber <simon.gerber@inf.ethz.ch>

DMA library: Bugfixes and missing implementations for IOAT

Moved the missing parts of the IOAT DMA driver into the library and
fixed some bugs in the initialization. Basic NOP descriptor test worked.

Also changed the channel get status queries to not accessing the device
register by default.

Changed the completion address reading to the memory region instead of
the register.

Added a new interface for IOAT DMA manager domain. (the driver domain)

Renaimed the scope of the error codes to DMA_ERR_*

LIB DMA: introduced generic parts of the structs (not fully done yet)

LIBDMA: intial commit for IOAT DMA devices based on usr/driver/ioat