[ALSA] bt87x - Add known PCI ID entries

Added the PCI ID entries for known working devices
- Prolink PixelView PV-M4900
- Pinnacle  Studio PCTV rave

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>