drivers: hda: use interrupt for timing L1 exit on host DMA

To properly setup L1 exit timing this patch will use buffer interrupt
for HOST DMA and wait for Host HDA to actually start
First interrupt will clear all others.

Signed-off-by: Adrian Bonislawski <adrian.bonislawski@intel.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>