hash: move struct field to keep ABI stable
hash: move struct field to keep ABI stable

In order to keep the ABI consistent with the old hash library,
hash_func_init_val field has been moved, so it remains
at the same offset as previously, since hash_func and
hash_func_init_val are fields accessed by the public function
rte_hash_hash and must keep the same offset as older versions.

Fixes: 48a399119619 ("hash: replace with cuckoo hash implementation")

Signed-off-by: Pablo de Lara <28355d9cfe41bb8148aea0fb24f47aae8f4217a1@intel.com>

john-mcnamara-intel/dpdk,mixja/dpdk,msune/dpdk,venkynv/dpdk-mirror,mixja/dpdk,tsphillips/dpdk-fork,john-mcnamara-intel/dpdk,tsphillips/dpdk-fork,tsphillips/dpdk-fork,msune/dpdk,msune/dpdk,mixja/dpdk,venkynv/dpdk-mirror,john-mcnamara-intel/dpdk,mixja/dpdk,john-mcnamara-intel/dpdk,venkynv/dpdk-mirror,tsphillips/dpdk-fork,msune/dpdk,venkynv/dpdk-mirror