misc: tegra-profiler: fix setup bug

misc: tegra-profiler: fix setup bug

* Fix bug that happens when using non-standard profiling frequencies
* Allow root user to use any frequency in range [100 Hz; 100 kHz]

Bug 200005366

Change-Id: I9a07e2c9c1fec6d61f34009d1975ea7f5d0e2592
Signed-off-by: Igor Nabirushkin <inabirushkin@nvidia.com>
Reviewed-on: http://git-master/r/410705
(cherry picked from commit baa22c2e4e7b1f676fec2456907c8f8ce43c6c03)
Reviewed-on: http://git-master/r/454443
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Tested-by: Maxim Morin <mmorin@nvidia.com>
Reviewed-by: Mitch Luban <mluban@nvidia.com>