mempool: remove useless variable
mempool: remove useless variable

Remove n_orig variable as it is not required.

Signed-off-by: Keith Wiles <f97a07384723981b442bf4ce37d40edbfd008094@windriver.com>
Acked-by: Thomas Monjalon <ee2fa8b2681c737f775687e475dcbf2028a412f1@6wind.com>

phermansson/dpdk,phermansson/dpdk,phermansson/dpdk,phermansson/dpdk