Benchmark argument is handled by custom argument parsing code which is
more complicated than it needs to be.
Process benchmark argument within the normal getopt() handling and drop
unnecessary ben_ind and has_ben variables. When -b is given, terminate
the argument processing as -b consumes all remaining arguments.
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Tested-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com> Reviewed-by: Reinette Chatre <reinette.chatre@intel.com> Reviewed-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com> Reviewed-by: "Wieczor-Retman, Maciej" <maciej.wieczor-retman@intel.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>