[PATCH v2] efd: lookup with RISC-V vector extension

[sunyuechi at iscas.ac.cn]

```
#elif defined(RTE_ARCH_RISCV) && defined(RTE_RISCV_FEATURE_V)
#include <riscv_vector.h>
#include "rte_efd_rvv.h"
```

rte_efd_rvv.h already includes #include <riscv_vector.h>

```
EFD_LOOKUP_NUM,
EFD_LOOKUP_RVV
```

It seems that _NUM should be placed at the end?