audio: Add spaces around operator/delete redundant spaces

Fix problems about spaces:
-operator needs spaces around it, add them.
-somespaces are redundant, remove them.

Signed-off-by: Zhang Han <zhanghan64@huawei.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20210115012431.79533-1-zhanghan64@huawei.com
Message-Id: <20210115012431.79533-3-zhanghan64@huawei.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>