ALSA: cmi8330: revert comments about AD1848 back

In ALSA 1.0.20, the comments were changed to say CMI8330 instead of AD1848.
The CMI8330 chip includes two codecs - AD1848 and SB16, so the comments were
correct and are misleading now. Revert them back.

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>