cpu/x86: Rename paging structure variables for clarity

The following variables have been renamed:

* PDPE_table -> PDPT (Page Directory Pointer Table)
* PDE_tables -> PDT (Page Directory Table)

This change improves the consistency and clarity of the code
as per AMD Architecture Programmer's Manual document.

PML4 -> PDPT -> PDT -> 2MB Physical Page

TEST=Able to build and boot google/rex64.

Change-Id: Ib57d1d54c2c1f4fcce2315b508ed7643251a20c5
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83101
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Jérémy Compostella <jeremy.compostella@intel.com>

0 files changed, 0 insertions, 0 deletions