ALSA: azt3328: Assign boolean values to a bool variable

Fix the following coccicheck warnings:

./sound/pci/azt3328.c:2451:2-16: WARNING: Assignment of 0/1 to bool
variable.

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Link: https://lore.kernel.org/r/1612681361-63404-1-git-send-email-jiapeng.chong@linux.alibaba.com


Signed-off-by: Takashi Iwai <tiwai@suse.de>