mainboard/google/Kahlee: Combine BiosCallOuts files

There's no need to have these separated.

BUG=b:64932381
Test=Build & Boot

Change-Id: I22898d3bf95d5e9a8fc2643bfccae1e2f5b29e44
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/22184
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
3 files changed