perf intel-pt: Fix itrace defaults for perf script intel-pt documentation

Fix intel-pt documentation to reflect the change of itrace defaults for
perf script.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: stable@vger.kernel.org
Fixes: 4eb0681571 ("perf script: Make itrace script default to all calls")
Link: http://lkml.kernel.org/r/20190520113728.14389-4-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/Documentation/intel-pt.txt

@@ -88,16 +88,16 @@ smaller.
 
 To represent software control flow, "branches" samples are produced.  By default
 a branch sample is synthesized for every single branch.  To get an idea what
-data is available you can use the 'perf script' tool with no parameters, which
-will list all the samples.
+data is available you can use the 'perf script' tool with all itrace sampling
+options, which will list all the samples.
 
 	perf record -e intel_pt//u ls
-	perf script
+	perf script --itrace=ibxwpe
 
 An interesting field that is not printed by default is 'flags' which can be
 displayed as follows:
 
-	perf script -Fcomm,tid,pid,time,cpu,event,trace,ip,sym,dso,addr,symoff,flags
+	perf script --itrace=ibxwpe -F+flags
 
 The flags are "bcrosyiABEx" which stand for branch, call, return, conditional,
 system, asynchronous, interrupt, transaction abort, trace begin, trace end, and
@@ -713,7 +713,7 @@ Having no option is the same as
 
 which, in turn, is the same as
 
-	--itrace=ibxwpe
+	--itrace=cepwx
 
 The letters are: