ethdev: remove unused deferred device state
ethdev: remove unused deferred device state

DEFERRED state replaced by ownership concept and it is no more used as
code comment states.

ethdev ABI broken on this release use this opportunity to remove
DEFERRED state.

Signed-off-by: Ferruh Yigit <ba8734c3c506d2e3557bd4ac8fdaccd25bdb9aa7@intel.com>
Acked-by: Matan Azrad <6969f5f553ad7652679a585a85d7321babc90464@mellanox.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk