net/avf: fix unused variables and label

net/avf: fix unused variables and label

Compiling with all warnings turned on causes errors about unused variables
and an unused label. Remove these to allow building without having to
disable those warnings.

Fixes: 69dd4c3d0898 ("net/avf: enable queue and device")
Fixes: 3fd7a3719c66 ("net/avf: enable ops for MTU setting")
Fixes: d6bde6b5eae9 ("net/avf: enable Rx interrupt")
Fixes: 22b123a36d07 ("net/avf: initialize PMD")
Fixes: 319c421f3890 ("net/avf: enable SSE Rx Tx")
Fixes: a2b29a7733ef ("net/avf: enable basic Rx Tx")
Fixes: 1060591eada5 ("net/avf: enable bulk allocate Rx")
CC: stable@dpdk.org
Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Luca Boccassi <bluca@debian.org>