Default case of the switch statement causes deadlock because it returns
without unlocking the 'flow_ops_lock' lock. Fixing it.
Fixes: 0d6ef740e4 ("net/ice: support flow ops thread safe")
Cc: stable@dpdk.org
Signed-off-by: Yu Wenjun <yuwenjun0x@163.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>