arch/x86 & commonlib: Add macros for postcodes used in x86/tables

The 0x9a, 0x9b, and 0x9c postcodes are not used anywhere else in the
coreboot tree other than in arch/x86/tables.c.  Add macros to
standardize these postcodes.

Signed-off-by: Martin Roth <gaumless@gmail.com>
Change-Id: I16be65ffa3f0b253fe4a9bb7bfb97597a760ad3f
Reviewed-on: https://review.coreboot.org/c/coreboot/+/69200
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Fred Reitberger <reitbergerfred@gmail.com>

0 files changed, 0 insertions, 0 deletions