[ALSA] This patch adds support for a wavetable chip on

the BTC 1817DW board.
The QS1000 is connected through the digital input
to the Opti931 chip.

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>