!630 vfio/pci: Fix mistakenly deleted "vdev->num_regions"

Merge Pull Request from: @did-you-collect-the-wool-today 
 
virt inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I6LQMC


CVE: NA

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In commit 6f5013f4, the 'vdev->num_regions' was deleted by mistake.

Fixes: 6f5013f4 (Revert "vfio/pci: Add framework for custom interrupt indices")
Signed-off-by: Kunkun Jiang <jiangkunkun@huawei.com>
 
Link:https://gitee.com/openeuler/kernel/pulls/630

 

Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>