i40e: Disable hw-tc-offload feature on driver load

After loading driver hw-tc-offload is enabled by default.
Change the behaviour of driver to disable hw-tc-offload by default as
this is the expected state. Additionally since this impacts ntuple
feature state change the way of checking NETIF_F_HW_TC flag.

Signed-off-by: Norbert Zulinski <norbertx.zulinski@intel.com>
Signed-off-by: Przemyslaw Patynowski <przemyslawx.patynowski@intel.com>
Signed-off-by: Mateusz Palczewski <mateusz.palczewski@intel.com>
Tested-by: Dave Switzer <david.switzer@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>