net/ice: refine RSS configure

net/ice: refine RSS configure

The ICE_RSS_ANY_HEADERS will try to enable outer RSS for
non-tunnel case and inner RSS for tunnel case. This confuse
user.

As we already have ICE_RSS_INNER_HEADER for tunnel case,
So, replace ICE_RSS_ANY_HEADERS with ICE_RSS_OUTER_HEADERS
for all exist flow which only specified the outer pattern.

To enable inner RSS for any tunnel cases, a separated rule
should be enabled.

The patch also remove some unnecessary condition check for GTPU
in base code, as we already can support outer RSS for GTPU.

Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
Acked-by: Xuan Ding <xuan.ding@intel.com>