arm64: correct bridge type for QEMUVIRT machine

The device pcie-pci-bridge in qemu will create a pci bus not pcie bus.
It should be corrected for QEMUVIRT.
After correct this, vfio pci device can be hotplugged in arm64.

Fixes: #3016
Signed-off-by: Jianyong Wu <jianyong.wu@arm.com>
(cherry picked from commit 141de5c)

Author: jongwu

virtcontainers/qemu.go

@@ -1965,7 +1965,7 @@ func genericBridges(number uint32, machineType string) []types.Bridge {
 	case QemuPC:
 		bt = types.PCI
 	case QemuVirt:
-		bt = types.PCIE
+		bt = types.PCI
 	case QemuPseries:
 		bt = types.PCI
 	case QemuCCWVirtio:

virtcontainers/qemu_arm64_test.go

@@ -119,7 +119,7 @@ func TestQemuArm64AppendBridges(t *testing.T) {
 
 	expectedOut := []govmmQemu.Device{
 		govmmQemu.BridgeDevice{
-			Type:    govmmQemu.PCIEBridge,
+			Type:    govmmQemu.PCIBridge,
 			Bus:     defaultBridgeBus,
 			ID:      bridges[0].ID,
 			Chassis: 1,