runtime: Remove unused qemuArchBase.appendBridges definition

qemuArchBase.appendBridges is never actually used, because the bare
qemuArchBase type is itself never used (outside of unit tests).  Instead
*all* the subclasses of qemuArchBase override appendBridges() to call
the very similar, but not identical genericAppendBridges.  So, we can
remove the qemuArchBase.appendBridges implementation.

Furthermore, all those subclasses override appendBridges() in exactly
the same way, and so we can remove *those* definitions and replace the
base class qemuArchBase appendBridges() with that version, calling
genericAppendBridges().

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

src/runtime/virtcontainers/qemu_arch_base.go

@@ -12,7 +12,6 @@ import (
 	"fmt"
 	"os"
 	"runtime"
-	"strconv"
 	"strings"
 
 	govmmQemu "github.com/kata-containers/govmm/qemu"
@@ -456,31 +455,7 @@ func (q *qemuArchBase) appendSCSIController(_ context.Context, devices []govmmQe
 
 // appendBridges appends to devices the given bridges
 func (q *qemuArchBase) appendBridges(devices []govmmQemu.Device) []govmmQemu.Device {
-	for idx, b := range q.Bridges {
-		if b.Type == types.CCW {
-			continue
-		}
-		t := govmmQemu.PCIBridge
-		if b.Type == types.PCIE {
-			t = govmmQemu.PCIEBridge
-		}
-
-		q.Bridges[idx].Addr = bridgePCIStartAddr + idx
-
-		devices = append(devices,
-			govmmQemu.BridgeDevice{
-				Type: t,
-				Bus:  defaultBridgeBus,
-				ID:   b.ID,
-				// Each bridge is required to be assigned a unique chassis id > 0
-				Chassis: idx + 1,
-				SHPC:    true,
-				Addr:    strconv.FormatInt(int64(q.Bridges[idx].Addr), 10),
-			},
-		)
-	}
-
-	return devices
+	return genericAppendBridges(devices, q.Bridges, q.qemuMachine.Type)
 }
 
 func generic9PVolume(volume types.Volume, nestedRun bool) govmmQemu.FSDevice {