monotonic_timer: Avoid calls from APs

Fixes regression with commit 45ddb4344

  console,boot_state: Exclude printk() from reported times

This was witnessed to cause boot regressions together with
LAPIC_MONOTONIC_TIMER=y. The code in cpu/x86/lapic/apic_timer.c
for timer_monotonic_get() is not SMP safe as LAPIC timers do not
run as synchronised as TSCs.

TBD: Time spent in printk() for APs is now incorrect in logs.

Change-Id: I1ea2c1e7172f8ab3692b42dee3f669c5942d864a
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
---
M src/console/printk.c
1 file changed, 3 insertions(+), 3 deletions(-)