OvmfPkg: Retrieve SMBIOS from Cloud Hypervisor

Add a fallback on the SMBIOS code to find the SMBIOS table for Cloud
Hypervisor if it couldn't be found for Qemu through fw_cfg.

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/SmbiosPlatformDxe/SmbiosPlatformDxe.h

@@ -33,4 +33,15 @@ GetQemuSmbiosTables (
   VOID
   );
 
+/**
+  Locates and extracts Cloud Hypervisor SMBIOS data
+
+  @return                 Address of extracted Cloud Hypervisor SMBIOS data
+
+**/
+UINT8 *
+GetCloudHvSmbiosTables (
+  VOID
+  );
+
 #endif