eal: fix doxygen for EAL cleanup
eal: fix doxygen for EAL cleanup

Align rte_eal_cleanup return codes description to the rest of dpdk.

Fixes: aec9c13c5257 ("eal: add function to release internal resources")
Cc: stable@dpdk.org

Signed-off-by: David Marchand <f28529695cfa9e3e1eb84e7072aa626af4abb18e@redhat.com>
Acked-by: Thomas Monjalon <5f50a84c1fa3bcff146405017f36aec1a10a9e38@monjalon.net>

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