Documentation/rtla: Fix typo in common_timerlat_options.txt

Fix spelling error "equilavent" in place of "equivalent".

Fixes: 173a3b014827 ("rtla/timerlat: Add the automatic trace option")
Signed-off-by: Tomas Glozar <[e-mail]>
Acked-by: Steven Rostedt (Google) <[e-mail]>
Signed-off-by: Jonathan Corbet <[e-mail]>
Message-ID: <[e-mail]>

Documentation/tools/rtla/common_timerlat_options.txt

···
         Set the automatic trace mode. This mode sets some commonly used options
         while debugging the system. It is equivalent to use **-T** *us* **-s** *us*
         **-t**. By default, *timerlat* tracer uses FIFO:95 for *timerlat* threads,
-        thus equilavent to **-P** *f:95*.
+        thus equivalent to **-P** *f:95*.
 
 **-p**, **--period** *us*