ASoC: SOF: Intel: hda-mlink: fixes and extensions

Merge series from Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>:

With additional testing with multiple links and multiple DAI types, we
found a couple of mistakes with refcounts, base address, missing
initialization.

A new helper was also added due to a change in the SoundWire
programming sequences, with the host driver in charge of setting up
the DMA channel mapping instead of the firmware.