tools/power turbostat: fix parameter passing for forked command

tools/power turbostat: fix parameter passing for forked command

Orabug: 24811361

turbostat supports forked command when sampling cpu state. However,
the forked command is not allowed to be executed with options, otherwise
turbostat might regard these options as invalid turbostat options.

For example:

./turbostat stress -c 4 -t 10
./turbostat: unrecognized option '-t'

Reported-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
(cherry picked from commit a01e72fbc41e322ed229465de8b595a7e3ec6549)
Signed-off-by: Brian Maly <brian.maly@oracle.com>
Signed-off-by: Dhaval Giani <dhaval.giani@oracle.com>