vhost_vdpa: support PACKED when setting-getting vring_base

mainline inclusion
from mainline-v6.4-rc6
commit beee7fdb
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I86ITO
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=beee7fdb5b56a46415a4992d28dd4c2d06eb52df



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Use the right structs for PACKED or split vqs when setting and
getting the vring base.

Fixes: 4c8cf318 ("vhost: introduce vDPA-based backend")
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Message-Id: <20230424225031.18947-4-shannon.nelson@amd.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: jiangdongxu <jiangdongxu1@huawei.com>