tracing: Fix spelling mistake: "analagous" -> "analogous"

There is a spelling mistake in the mini-howto help text. Fix it.

Link: http://lkml.kernel.org/r/20190217223222.16479-1-colin.king@canonical.comSigned-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

kernel/trace/trace.c

@@ -4916,7 +4916,7 @@ static const char readme_msg[] =
 	"\t    unchanged.\n\n"
 	"\t    The enable_hist and disable_hist triggers can be used to\n"
 	"\t    have one event conditionally start and stop another event's\n"
-	"\t    already-attached hist trigger.  The syntax is analagous to\n"
+	"\t    already-attached hist trigger.  The syntax is analogous to\n"
 	"\t    the enable_event and disable_event triggers.\n\n"
 	"\t    Hist trigger handlers and actions are executed whenever a\n"
 	"\t    a histogram entry is added or updated.  They take the form:\n\n"