net/ice: merge inner/outer seg info for flow director

net/ice: merge inner/outer seg info for flow director

For tunnel and non-tunnel packets, it can share the same seg_tun info.
seg_tun[1] can be used for supporting inner fields with tunnel flow rule
or for non-tunnel packets, seg_tun[0] only used for tunnel outer part.
Add outer_input_set to distinguish inner/outer input set. So we can
identify different fields in outer or inner part.

Signed-off-by: Zhirun Yan <zhirun.yan@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>