[M] Change in coreboot[master]: coreboot_tables: Make existing alignment conventions more explicit

[Jakub Czapiga (Code Review)]

Attention is currently required from: Peter Stuge, Julius Werner, Martin Roth, ron minnich.

Jakub Czapiga has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/70158 )

Change subject: coreboot_tables: Make existing alignment conventions more explicit
......................................................................

Patch Set 2:

(2 comments)

File src/commonlib/include/commonlib/coreboot_tables.h:

https://review.coreboot.org/c/coreboot/+/70158/comment/60fc59f9_f97de2f0 
PS2, Line 209: uint8_t pad[2];
             : };
             : 
Will padding work without structure packing?

File src/lib/coreboot_table.c:

https://review.coreboot.org/c/coreboot/+/70158/comment/1c8c2501_b2bcc22b 
PS2, Line 80: assert(IS_ALIGNED(rec->size, LB_ENTRY_ALIGN));
Without packing on proper size alignment it will fail very often. Many entries do not have their size aligned properly.