Move microcode to offset 0 of BIOS region.

Move microcode to offset 0 of BIOS region.

Move microcode, whose address is fixed by SEC binary, to offset 0 of BIOS region.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Mang Guo <mang.guo@intel.com>
Reviewed-by: David Wei <david.wei@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17224 6f19259b-4bc3-4df7-8a09-765794883524