Please stop using random I2C driver IDs.

Also removed a pointless initialization to 0 of a static struct member.
Acked-by: NTakashi Iwai <tiwai@suse.de>
Cc: Jarkko Nikula <jarkko.nikula@nokia.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>