MdeModulePkg PiSmmCoreMemoryAllocationLib: Get SMRAM ranges

MdeModulePkg PiSmmCoreMemoryAllocationLib: Get SMRAM ranges

 from FullSmramRanges and FullSmramRangeCount in SmmCorePrivate by Constructor.

It can avoid potential first call to FreePool() -> BufferInSmram() ->
if (mSmramRanges == NULL) { GetSmramRanges();} ->
gBS->LocateProtocol() at boottime with >= TPL_NOTIFY or
after ReadyToLock or at OS runtime.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17463 6f19259b-4bc3-4df7-8a09-765794883524