@param This Pointer to the EFI_SMM_GPI_DISPATCH_PROTOCOL instance.\r
@param DispatchFunction Function to install.\r
@param DispatchContext Pointer to the dispatch function's context.\r
@param This Pointer to the EFI_SMM_GPI_DISPATCH_PROTOCOL instance.\r
@param DispatchFunction Function to install.\r
@param DispatchContext Pointer to the dispatch function's context.\r