[ALSA] virtuoso: restrict period time to less than 10 s

Add a constraint for the period time so that there are less than ten
seconds between interrupts so that ALSA does not assume that the device
is dead.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>