cpu/x86/mp_init: Print amount of time it takes in bsp_do_flight_plan

Since the timeout in bsp_do_flight_plan is bumped up to 1 second, this
change adds a print to indicate the amount of time it takes for all the
APs to check-in.

TEST=Verified on Nami that it prints:
"bsp_do_flight_plan done after 395 msecs."

Change-Id: I4c8380e94305ed58453ed18b341b3b923949d7a8
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/25044
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
1 file changed