Fix some recurring typos: postion->position, *atino->*ation

libc/wqueue/work_thread.c

@@ -233,7 +233,7 @@ static void work_process(FAR struct wqueue_s *wqueue)
  *     These worker threads are started by the OS during normal bringup.
  *
  *   work_usrthread:  This is a user mode work queue.  It must be built into
- *     the applicatino blob during the user phase of a kernel build.  The
+ *     the application blob during the user phase of a kernel build.  The
  *     user work thread will then automatically be started when the system
  *     boots by calling through the pointer found in the header on the user
  *     space blob.