ALSA: hdspm - Add RayDAT and AIO strings to Kconfig

Inform users about the newly added support for RayDAT and AIO.

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