misc: tegra-profiler: fix backtraces for 64-bit

misc: tegra-profiler: fix backtraces for 64-bit

* Fix backtraces for 64-bit programs
* Also, allow user to use any frequency in range [100 Hz; 100 kHz]

Bug 1527404

Change-Id: I29495ddd1449e59b354ac00d4112bdf7b9845375
Signed-off-by: Igor Nabirushkin <inabirushkin@nvidia.com>
Reviewed-on: http://git-master/r/427738
(cherry picked from commit b4f84b60177750214ddac24c63c2f9a08b15ce05)
Reviewed-on: http://git-master/r/454469
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Tested-by: Maxim Morin <mmorin@nvidia.com>
Reviewed-by: Mitch Luban <mluban@nvidia.com>