port id in test case is update to unsigned int 16 bit, to
prevent compilation failure when RTE_MAX_ETHPORTS port is
set more than 255.
Fixes: fc8030eb8fe9 ("test/eventdev: add tests for eth Rx adapter APIs")
Cc: stable@dpdk.org
Signed-off-by: Vipin Varghese <vipin.varghese@intel.com>
Acked-by: Nikhil Rao <nikhil.rao@intel.com>