timer: Change timer util functions to 64-bit

Since mono_time is now 64-bit, the utility functions interfacing with
mono_time should also be 64-bit so precision isn't lost.

Fixed build errors related to printing the now int64_t result of
stopwatch_duration_[m|u]secs in various places.

BUG=b:237082996
BRANCH=All
TEST=Boot dewatt

Change-Id: I169588f5e14285557f2d03270f58f4c07c0154d5
Signed-off-by: Rob Barnes <robbarnes@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66170
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
diff --git a/src/lib/hardwaremain.c b/src/lib/hardwaremain.c
index e45ac9f..714452d 100644
--- a/src/lib/hardwaremain.c
+++ b/src/lib/hardwaremain.c
@@ -283,7 +283,7 @@
 			bscb->callback(bscb->arg);
 			if (CONFIG(DEBUG_BOOT_STATE)) {
 				timer_monotonic_get(&mt_stop);
-				printk(BIOS_DEBUG, "BS: callback (%p) @ %s (%ld ms).\n", bscb,
+				printk(BIOS_DEBUG, "BS: callback (%p) @ %s (%lld ms).\n", bscb,
 				       bscb_location(bscb),
 				       mono_time_diff_microseconds(&mt_start, &mt_stop)
 					       / USECS_PER_MSEC);