uacce: delete unneeded variable initialization

delete unneeded variable initialization.

Signed-off-by: Kai Ye <yekai13@huawei.com>
Link: https://lore.kernel.org/r/1616749747-3882-1-git-send-email-yekai13@huawei.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>