ALSA: hdspm - Allow SingleSpeed WordClock when in DS/QS mode

Similarly to MADI, WordClock can also be at SingleSpeed while the card
is actually working at twice or four times this rate. If so, multiply
the base rate accordingly.

Signed-off-by: Adrian Knoth <adi@drcomp.erfurt.thur.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>