uacce: add the reference counter protection

driver inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5VVP6


CVE: NA

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The device driver pointer will be set null during hot plugging.
So should use the device driver null check to pretect put queue.
Otherwise the null pointer may cause the oom ops as doing hot plugging.

Signed-off-by: Yu'an Wang <wangyuan46@huawei.com>
Reviewed-by: Kai Ye <yekai13@huawei.com>
Reviewed-by: Longfang Liu <liulongfang@huawei.com>
Reviewed-by: li yongxin <liyongxin1@huawei.com>
Signed-off-by: Laibin Qiu <qiulaibin@huawei.com>