net/dpaa2: handle secondary process for DPNI

net/dpaa2: handle secondary process for DPNI

This change uses 'dev->process_private' instead of 'priv->hw'
to get dpmcp per process while setting flow distribution,
as priv->hw is only valid for primary process.
It also initialize rte_dpaa2_bpid_info in secondary process.

Signed-off-by: Jun Yang <jun.yang@nxp.com>
Acked-by: Hemant Agrawal <hemant.agrawal@nxp.com>