The code to set the graphics translation table has been in the mainboards, but should be in the northbridge support code. Move the function, give it a better name, and enable support for > 4 GiB while we're at it, in the remote possibility that we get some 8 GiB haswell boards. Change-Id: I72b4a0a88e53435e00d9b5e945479a51bd205130 Signed-off-by: Ronald G. Minnich <rminnich@google.com> Reviewed-on: https://chromium-review.googlesource.com/171160 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Furquan Shaikh <furquan.m.shaikh@gmail.com> Commit-Queue: Ronald Minnich <rminnich@chromium.org> Tested-by: Ronald Minnich <rminnich@chromium.org> (cherry picked from commit d5a429498147c479eb51477927e146de809effce) Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com> Reviewed-on: http://review.coreboot.org/6741 Tested-by: build bot (Jenkins)