[coreboot] Regression with new toolchain and AGESA boards

[Paul Menzel]

Dear coreboot folks,

GCC 6.3 shipped with the new coreboot toolchain 1.44 creates code
differently causing the boot to fail with the latest commits.

Yesterday, once again, Kyösti showed how awesome he, and pushed a fix
for review [1][2].

It’d be great if you could help test that.

Thanks,

Paul

[1] https://review.coreboot.org/18622/
    "AGESA: Fix SSE regression and align stack early"
[2] https://review.coreboot.org/18691/
    "binaryPI: Fix SSE regression and align stack early"