Clear the whole EFI_PHYSICAL_ADDRESS CapsuleDataPtr64 to 0 at first to avoid rubbish data in high 32 bits.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Elvin Li <elvin.li@intel.com>
Review-by: Feng Tian <feng.tian@intel.com>



git-svn-id: svn://svn.code.sf.net/p/edk2/code/trunk/edk2/MdeModulePkg@15675 6f19259b-4bc3-4df7-8a09-765794883524