virnetdevopenvswitch: Fix qos cleaning residual on multi interfaces
virnetdevopenvswitch: Fix qos cleaning residual on multi interfaces

Warn these error instead of return when removing qos or queues. This will
avoid residual qos clearance on multiple interfaces.

Signed-off-by: zhangjl02 <93aaead8febf86bb49fc29aaae44e4159fb14a6a@inspur.com>
Reviewed-by: Michal Privoznik <83d82aaba2eed257f4814b0c239c260c4caaadf0@redhat.com>

libvirt/libvirt,jfehlig/libvirt,zippy2/libvirt,nertpinx/libvirt,crobinso/libvirt,olafhering/libvirt,zippy2/libvirt,crobinso/libvirt,libvirt/libvirt,nertpinx/libvirt,crobinso/libvirt,olafhering/libvirt,jfehlig/libvirt,zippy2/libvirt,olafhering/libvirt,jfehlig/libvirt,crobinso/libvirt,jfehlig/libvirt,nertpinx/libvirt,nertpinx/libvirt,libvirt/libvirt,libvirt/libvirt,zippy2/libvirt,olafhering/libvirt,nertpinx/libvirt