[ALSA] hdspm: Add support for AES32

Add support for AES32. Difference between MADI and AES32 is done
through revision. Master support is not finished for now (RME so-called DDS
feature is not supported yet)

Signed-off-by: Remy Bruno <remy.bruno@trinnov.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>