[ALSA] Disable debugging output for the ALS300 driver

Disables debugging output in the ALS300 driver.
Also contains a whitespace cleanup and a fix for a potential bug.

Signed-off-by: Ash Willis <ashwillis@programmer.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>