net/i40e: fix flow RSS return error

net/i40e: fix flow RSS return error

This patch fixes issues reported by Coverity check. Function
parse_rss_action and i40e_config_rss_filter might return at wrong
time which will cause error for RSS configuration and parser. Hash
function variable with 32 bits width might also cause error when
it needs more than 32 bits, so change this variable to 64 bits.

Coverity issue: 257020, 257024, 257037
Fixes: ecad87d22383 ("net/i40e: move RSS to flow API")

Signed-off-by: Wei Zhao <wei.zhao1@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>