Flow director rule can't be created when the flow table is nearly full.
The patch fixed this issue to enable created flows reaching the maximum
number.
Fixes: 1a2fc1799f09 ("net/ice: reject duplicated flow for flow director")
Signed-off-by: Ying A Wang <ying.a.wang@intel.com> Acked-by: Xiaolong Ye <xiaolong.ye@intel.com>