ASoC: SOF: Intel: hda-dai: Do not release the link DMA on STOP

In the Linux kernel, the following vulnerability has been resolved:

ASoC: SOF: Intel: hda-dai: Do not release the link DMA on STOP

The linkDMA should not be released on stop trigger since a stream re-start

might happen without closing of the stream. This leaves a short time for

other streams to 'steal' the linkDMA since it has been released.

This issue is not easy to reproduce under normal conditions as usually

after stop the stream is closed, or the same stream is restarted, but if

another stream got in between the stop and start, like this:

aplay -Dhw:0,3 -c2 -r48000 -fS32_LE /dev/zero -d 120

CTRL+z

aplay -Dhw:0,0 -c2 -r48000 -fS32_LE /dev/zero -d 120

then the link DMA channels will be mixed up, resulting firmware error or

crash.