Patch merged into coreboot/master: cpu/amd/mtrr.h: Drop excessive includes

the following patch was just integrated into master:
commit 3a0cb458dcca564f006ed2c322eeb683f269776f
Author: Kyösti Mälkki 
Date:   Tue Dec 6 16:40:39 2016 +0200

cpu/amd/mtrr.h: Drop excessive includes

Change-Id: Id404bdab1f2361f1e7d20f7ee72111971863dddf
    Signed-off-by: Kyösti Mälkki 
    Reviewed-on: https://review.coreboot.org/17736
    Tested-by: build bot (Jenkins)
    Reviewed-by: Aaron Durbin

See https://review.coreboot.org/17736 for details.

-gerrit