MdeModulePke: DxeCore NotifyFwVolBlock() function issue

Fix DxeCore NotifyFwVolBlock() function to make sure FV protocol is installed for all valid PI FV images.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Guo Dong <guo.dong@intel.com>


git-svn-id: svn://svn.code.sf.net/p/edk2/code/trunk/edk2/MdeModulePkg@16496 6f19259b-4bc3-4df7-8a09-765794883524