There were further chances for a use after free by returning an already
freed pointer in rte_lpm_create for v20 and v1604.
Along that is also makes the RTE_LOG messages of the failed allocations
unique.
Fixes: f1f7261838b3 ("lpm: add a new config structure for IPv4")
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Acked-by: Olivier Matz <olivier.matz@6wind.com>
34c4b5846e