SmbiosDxe: Fill in some blanks for pre-existing tables support

Given a base address (that it doesn't look up yet), it can register
the memory regions and some interesting meta data.

Missing:
 - determine entry point to table
 - build the linked list to point to table entries

Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
corebootPkg/Sec/X64: Align SecEntry to page size

We need to setup page tables on X64 which must be page aligned.
This never quite worked since the final step (adding SecMain.efi to
the firmware volume) linked the file to some non-4K alignment, so
enforce it.

Requires latest cbfstool with support for alignment related padding
data in FV.

Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>