net/ice/base: refactor data structure

net/ice/base: refactor data structure

When declaring the ice_prot_ext, and ice_prot_id_tbl structure,
we can use a fixed length array instead of a variable length one
which helps us catch future code changes that might desynchronize
the enum ice_protocol_type and the structs.  This change also
necessitates removing the last member of the structs which was
just there to be a placeholder.

Also reorder the ice_prot_ext struct to match the ordering in the
associated enum ice_protocol_type.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@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: Qiming Yang <qiming.yang@intel.com>