Add runtime registration function to all PCI Libs

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6708 6f19259b-4bc3-4df7-8a09-765794883524

MdePkg/Library/UefiPciLibPciRootBridgeIo/PciLib.c

@@ -142,6 +142,33 @@ DxePciLibPciRootBridgeIoWriteWorker (
   return Data;
 }
 
+/**
+  Register a PCI device so PCI configuration registers may be accessed after 
+  SetVirtualAddressMap().
+  
+  If Address > 0x0FFFFFFF, then ASSERT().
+
+  @param  Address Address that encodes the PCI Bus, Device, Function and
+                  Register.
+  
+  @retval RETURN_SUCCESS           The PCI device was registered for runtime access.
+  @retval RETURN_UNSUPPORTED       An attempt was made to call this function 
+                                   after ExitBootServices().
+  @retval RETURN_UNSUPPORTED       The resources required to access the PCI device
+                                   at runtime could not be mapped.
+  @retval RETURN_OUT_OF_RESOURCES  There are not enough resources available to
+                                   complete the registration.
+
+**/
+RETURN_STATUS
+EFIAPI
+PciRegisterForRuntimeAccess (
+  IN UINTN  Address
+  )
+{
+  return RETURN_UNSUPPORTED;
+}
+
 /**
   Reads an 8-bit PCI configuration register.