!138 vfio-pci: Mask cap zero

Merge Pull Request from: @babyihc 
 
This PR is cherry-pick from upstream "vfio-pci: Mask cap zero"

Upstream patch:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bc138db1b96264b9c1779cf18d5a3b186aa90066
 
 
Link:https://gitee.com/openeuler/kernel/pulls/138

 
Reviewed-by: Laibin Qiu <qiulaibin@huawei.com>
Signed-off-by: Xie XiuQi <xiexiuqi@huawei.com>