tracing/timer: Add missing argument documentation of trace points

Documentation of trace points timer_start, timer_expire_entry and
hrtimer_start lack always the last argument. Add it to keep implementation
and documentation in sync.

Signed-off-by: Anna-Maria Behnsen <anna-maria@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Link: https://lore.kernel.org/r/20220411140115.24185-1-anna-maria@linutronix.de

Author: anna-marialx

include/trace/events/timer.h

@@ -48,6 +48,7 @@ DEFINE_EVENT(timer_class, timer_init,
  * timer_start - called when the timer is started
  * @timer:	pointer to struct timer_list
  * @expires:	the timers expiry time
+ * @flags:	the timers flags
  */
 TRACE_EVENT(timer_start,
 
@@ -84,6 +85,7 @@ TRACE_EVENT(timer_start,
 /**
  * timer_expire_entry - called immediately before the timer callback
  * @timer:	pointer to struct timer_list
+ * @baseclk:	value of timer_base::clk when timer expires
  *
  * Allows to determine the timer latency.
  */
@@ -190,7 +192,8 @@ TRACE_EVENT(hrtimer_init,
 
 /**
  * hrtimer_start - called when the hrtimer is started
- * @hrtimer: pointer to struct hrtimer
+ * @hrtimer:	pointer to struct hrtimer
+ * @mode:	the hrtimers mode
  */
 TRACE_EVENT(hrtimer_start,