Function rcudnn::cudnnCreatePersistentRNNPlan

pub unsafe extern "C" fn cudnnCreatePersistentRNNPlan(
    rnnDesc: *mut cudnnRNNStruct, 
    minibatch: i32, 
    dataType: cudnnDataType_t, 
    plan: *mut *mut cudnnPersistentRNNPlan
) -> cudnnStatus_t