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c6fc823413
In shell spec, the usage of "Drvcfg" command is: drvcfg [-l XXX] [-c] [-f <Type>|-v|-s] [DriverHandle [DeviceHandle [ChildHandle]]] [-i filename] [-o filename]. The parameter number(doesn't include the flags) cannot exceed 4, now we add this point to check whether using the command correctly. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Dandan Bi <dandan.bi@intel.com> Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com> Reviewed-by: Jaben Carsey <jaben.carsey@intel.com> Reviewed-by: Tapan Shah <tapandshah@hpe.com>