vdpa: Avoid duplicate call to vp_vdpa get_status

mainline inclusion
from mainline-v5.17-rc1
commit 23118b09
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5WXCZ
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=23118b09e6e11a03cb40a86875d5d342257ae1ec



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It has no sense to call get_status twice, since we already have a
variable for that.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Link: https://lore.kernel.org/r/20211104195833.2089796-1-eperezma@redhat.com


Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Pengyuan Zhao <zhaopengyuan@hisilicon.com>