mempool/octeontx: fix aura to pool mapping

mempool/octeontx: fix aura to pool mapping

When sending commands to Kernel FPA PF driver, it expects the
aura to be in the range of 0 to 16 for a given FPA pool.
In OCTEON TX we map a pool,aura pair as single mempool handle,
always set the aura id to 0 for a given FPA pool.

Fixes: 179c7e893f64 ("mempool/octeontx: fix pool to aura mapping")
Cc: stable@dpdk.org
Signed-off-by: Pavan Nikhilesh <pbhagavatula@marvell.com>
Acked-by: Jerin Jacob <jerinj@marvell.com>