x86: Stop building the vboot library using regparm=3.

This complicates things in a number of ways, including making GDB not work
properly because it assumes the standard ABI in some places. Measurements
show that it doesn't really make much difference performance wise.

TEST=Built and booted with coreboot and depthcharge on link.

Change-Id: I7f004f8cf83b7c1a78ab12f814477504a5a5c28c
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://chromium-review.googlesource.com/180874
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Reviewed-by: Stefan Reinauer <reinauer@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/183163
Tested-by: Aaron Durbin <adurbin@chromium.org>
Commit-Queue: Aaron Durbin <adurbin@chromium.org>
1 file changed