'rte_eth_dev_get_port_by_name()' return value is not checked caught by
coverity, adding return value check.
Coverity issue: 305853
Fixes: 96cb19521147 ("net/ring: use EAL APIs in PMD specific API")
Cc: stable@dpdk.org
Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
e0474b94f8