net: txgbe: add FDIR info to ethtool ops

Add flow director filter match and miss statistics to ethtool -S.
And change the number of queues when using flow director for ehtool -l.

Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>