Patch merged into coreboot/master: cpu/x86: remove BACKUP_DEFAULT_SMM_REGION option

the following patch was just integrated into master:
commit d87c7bc07c03d80fc7c346a027cb000657f1e76b
Author: Aaron Durbin 
Date:   Sat Apr 30 15:14:18 2016 -0500

cpu/x86: remove BACKUP_DEFAULT_SMM_REGION option

Unconditionally provide the backup default SMM area API. There's no
    reason to guard the symbols behind anything since linker garbage
    collection is implemented. A board or chipset is free to use the
    code or not without needing to select an option.

Change-Id: I14cf1318136a17f48ba5ae119507918190e25387
    Signed-off-by: Aaron Durbin 
    Reviewed-on: https://review.coreboot.org/14561
    Tested-by: build bot (Jenkins)
    Reviewed-by: Martin Roth

See https://review.coreboot.org/14561 for details.

-gerrit