pw_sync: use timeout & deadline over {until,for}_at_least

The signatures, comments, and docs are updated to reflect the most
recent terminology for describing blocking APIs with timeouts and
deadlines.

Change-Id: Iea7ea5490c44c9ce698a694e532345909bba562f
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/60040
Reviewed-by: Keir Mierle <keir@google.com>
Pigweed-Auto-Submit: Ewout van Bekkum <ewout@google.com>
Commit-Queue: Ewout van Bekkum <ewout@google.com>
diff --git a/pw_sync/binary_semaphore_facade_test.cc b/pw_sync/binary_semaphore_facade_test.cc
index b3d136f..11ca6c5 100644
--- a/pw_sync/binary_semaphore_facade_test.cc
+++ b/pw_sync/binary_semaphore_facade_test.cc
@@ -32,11 +32,10 @@
 void pw_sync_BinarySemaphore_CallAcquire(pw_sync_BinarySemaphore* semaphore);
 bool pw_sync_BinarySemaphore_CallTryAcquire(pw_sync_BinarySemaphore* semaphore);
 bool pw_sync_BinarySemaphore_CallTryAcquireFor(
-    pw_sync_BinarySemaphore* semaphore,
-    pw_chrono_SystemClock_Duration for_at_least);
+    pw_sync_BinarySemaphore* semaphore, pw_chrono_SystemClock_Duration timeout);
 bool pw_sync_BinarySemaphore_CallTryAcquireUntil(
     pw_sync_BinarySemaphore* semaphore,
-    pw_chrono_SystemClock_TimePoint until_at_least);
+    pw_chrono_SystemClock_TimePoint deadline);
 ptrdiff_t pw_sync_BinarySemaphore_CallMax(void);
 
 }  // extern "C"