If there was no RTE_NET_I40E configured the static routine
str2flowtype() was not used causing compilation warning.
The str2flowtype() is moved under #ifdef RTE_NET_I40E block.
Fixes: 1be514fbce ("ethdev: remove legacy FDIR filter type support")
Signed-off-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>