net/ena/base: destroy multiple wait events

net/ena/base: destroy multiple wait events

Although the ENA DPDK PMD doesn't have to perform any actions for
destroying the wait event, some other platforms have to.

The macro "ENA_WAIT_EVENT_DESTROY" was renamed to
"ENA_WAIT_EVENTS_DESTROY" and also whole implementation responsible for
that was moved to a separate function for better readability.

Fixes: 3adcba9a8987 ("net/ena: update HAL to the newer version")
Cc: stable@dpdk.org
Signed-off-by: Michal Krawczyk <mk@semihalf.com>
Reviewed-by: Igor Chauskin <igorch@amazon.com>
Reviewed-by: Guy Tzalik <gtzalik@amazon.com>