app/testpmd: reset port status on close notification

app/testpmd: reset port status on close notification

Since rte_eth_dev_release_port() is called on all port close operations,
the event RTE_ETH_EVENT_DESTROY can be reliably used for resetting
the port status on the application side.

The intermediate state RTE_PORT_HANDLING is removed in close_port()
because a port can also be closed by a PMD in a device remove operation.

In case multiple ports are closed, calling remove_invalid_ports()
only once is enough.

Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>