ALSA: AOA: Convert onyx and tas codecs to new-style i2c drivers

The legacy i2c binding model is going away soon, so convert the AOA
codec drivers to the new model or they'll break.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Tested-by: Johannes Berg <johannes@sipsolutions.net>
Tested-by: Andreas Schwab <schwab@linux-m68k.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>