IntelFsp2Pkg BaseFspPlatformLib: Remove Boot Loader tempram Migration

IntelFsp2Pkg BaseFspPlatformLib: Remove Boot Loader tempram Migration

In FSP2.0, Boot loader should migrate its temp ram before
calling the tempramexit API to tear down the tempram. so, we don't need the
function to migrate the BL TempRam in the IntelFsp2Pkg.

Cc: Giri P Mudusuru <giri.p.mudusuru@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Satya Yarlagadda <satya.p.yarlagadda@intel.com>
Reviewed-by: Giri P Mudusuru <giri.p.mudusuru@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>