OvmfPkg/Microvm: PlatformPei/Platform: add id.

Add + set microvm id for PcdOvmfHostBridgePciDevId.

Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3599
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Jiewen Yao <Jiewen.yao@intel.com>

OvmfPkg/Include/IndustryStandard/Microvm.h

@@ -0,0 +1,12 @@
+/** @file
+  Various defines for qemu microvm
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+#ifndef __MICROVM_H__
+#define __MICROVM_H__
+
+#define MICROVM_PSEUDO_DEVICE_ID 0xfff1
+
+#endif // __MICROVM_H__