[BOOTLIB]: Fix assembly file containing Archx86TransferTo32BitApplicationAsm to use...

[BOOTLIB]: Fix assembly file containing Archx86TransferTo32BitApplicationAsm to use assume:nothing, otherwise we end up with SS segment overrides everywhere.
[BOOTLIB]: Correctly bias access to GDT/IDT registers by 2 bytes since this is a 48-bit instruction. The loaded GDT/IDT was previously invalid and causing random GPFs.
[BOOTLIB]: Fix EfiStall in protected mode. It was previously not stalling.
[BOOTLIB]: Fix calculation in MmMapPhysicalAddress
[BOOTLIB]: Fix missing goto in MmSelectMappingAddress which broke the function in real mode.
[BOOTLIB]: Fix incorrect ranges in MmSelectMappingAddress.
[BOOTLIB]: Fix incorrect offset calculation in MmSelectMappingAddress.
Now hitting (as expected), unimplemented virtual code path in BlMmMapPhysicalAddressEx.

svn path=/trunk/; revision=73801