Parsing command line parameters is done in the shell command wrapper. This declutters the core code and improves modular design. Cc: Ray Ni <ray.ni@intel.com> Cc: Zhichao Gao <zhichao.gao@intel.com> Reviewed-by: Zhichao Gao <zhichao.gao@intel.com> Signed-off-by: Tomas Pilar <tomas.pilar@arm.com>