OvmfPkg: Handle Cloud Hypervisor host bridge

Handle things differently when the detected host bridge matches the
Cloud Hypervisor PCI host bridge identifier.

Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>

OvmfPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.c

@@ -50,6 +50,9 @@ AcpiTimerLibConstructor (
     case INTEL_Q35_MCH_DEVICE_ID:
       Pmba = POWER_MGMT_REGISTER_Q35 (ICH9_PMBASE);
       break;
+    case CLOUDHV_DEVICE_ID:
+      mAcpiTimerIoAddr = CLOUDHV_ACPI_TIMER_IO_ADDRESS;
+      return RETURN_SUCCESS;
     default:
       DEBUG ((
         DEBUG_ERROR,