Add a mode type check for tunnel mode, if FDIR is in this mode,
it does not need to do sanity check for x550.
Fixes: a2ba854ec616 ("net/ixgbe: fix MAC VLAN filter fail problem")
Cc: stable@dpdk.org
Signed-off-by: Wei Zhao <wei.zhao1@intel.com>
Acked-by: Wenzhuo Lu <wenzhuo.lu@intel.com>