net/ice/base: return switch error on invalid match criteria

net/ice/base: return switch error on invalid match criteria

Modify ice_add_adv_rule to return an error when an invalid match
criteria is requested by the caller. This happens when the protocol
and offset pair is not supported by the package.

This change required a fix for the offset in the VXLAN GPE header,
and also found an issue with NVGRE where the package does not seem
to extract the correct offsets.

Signed-off-by: Dan Nowlin <dan.nowlin@intel.com>
Signed-off-by: Paul M Stillwell Jr <paul.m.stillwell.jr@intel.com>
Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
Acked-by: Xiaolong Ye <xiaolong.ye@intel.com>