MdePkg: Do not use CreateEventEx unless required

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2446

There are many firmwares in the wild not supporting CreateEventEx,
including devices less than 5 years old.

Signed-off-by: Vitaly Cheptsov <vit9696@protonmail.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

MdePkg/Library/PciSegmentLibSegmentInfo/DxeRuntimePciSegmentLibSegmentInfo.inf

@@ -45,6 +45,3 @@
   MemoryAllocationLib
   DxeServicesTableLib
   UefiBootServicesTableLib
-
-[Guids]
-  gEfiEventVirtualAddressChangeGuid         ## CONSUMES ## Event