ramstage: remove rela_time use

mono_time_diff_microseconds() is sufficient for determining
the microsecond duration between 2 monotonic counts.

BUG=None
BRANCH=None
TEST=Built and booted. Bootstate timings still work.

Change-Id: I53df0adb26ae5205e2626b2995c2e1f4a97b012e
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: deab836febea72ac6715cccab4040da6f18a8149
Original-Change-Id: I7b9eb16ce10fc91bf515c5fc5a6f7c80fdb664eb
Original-Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/219711
Original-Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Original-Reviewed-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: http://review.coreboot.org/8818
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
1 file changed