perf scripts intel-pt-events.py: Fix IPC output for Python 2

Bugzilla: https://bugzilla.redhat.com/2233483

upstream
========
commit 1f64cfdebfe0494264271e8d7a3a47faf5f58ec7
Author: Roman Lozko <lozko.roma@gmail.com>
Date: Fri Mar 10 15:04:45 2023 +0000

description
===========
Integers are not converted to floats during division in Python 2 which
results in incorrect IPC values. Fix by switching to new division
behavior.

Fixes: a483e64c0b ("perf scripting python: intel-pt-events.py: Add --insn-trace and --src-trace")
    Signed-off-by: Roman Lozko <lozko.roma@gmail.com>
    Acked-by: Adrian Hunter <adrian.hunter@intel.com>
    Cc: Adrian Hunter <adrian.hunter@intel.com>
    Link: https://lore.kernel.org/r/20230310150445.2925841-1-lozko.roma@gmail.com
    Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Signed-off-by: Michael Petlan <mpetlan@redhat.com>

tools/perf/scripts/python/intel-pt-events.py

@@ -11,7 +11,7 @@
 # FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 # more details.
 
-from __future__ import print_function
+from __future__ import division, print_function
 
 import io
 import os