ivshmem: fix PCI BAR2 registration during initialization Ivshmem cannot work, and the command lspci cannot show ivshmem BAR2 in the guest. As for pci_register_bar(), parameter MemoryRegion should be s->bar instead of s->ivshmem. Reviewed-by: Avi Kivity <avi@redhat.com> Signed-off-by: Hongyong Zang <zanghongyong@huawei.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>