net/ena: make ethdev references multi-process safe

net/ena: make ethdev references multi-process safe

rte_pci_device and rte_eth_dev are process-local structures. Therefore
ena_adapter::pdev and ena_adapter::rte_dev cannot be used universally.

Both ena_timer_wd_callback and ena_interrupt_handler_rte needs access to
the rte_eth_dev, but as they are being setup and executed in the primary
process, it is safe to pass there the same pointer, which is used for
the device configuration.

In all other cases, except the eth_ena_dev_init(), the rte_eth_dev_data
is used instead.

Signed-off-by: Stanislaw Kardach <kda@semihalf.com>
Signed-off-by: Michal Krawczyk <mk@semihalf.com>
Reviewed-by: Igor Chauskin <igorch@amazon.com>
Reviewed-by: Shay Agroskin <shayagr@amazon.com>