PICMG 3.1 R2.0 introduces new a new Link Class field in the FRU
Link Descriptors which is the upper 4 bits of the Link Type field.
This new Link Class field specifies SERDES lanes with 10.3125Gbd
signalling rate.
It also introduces the new Base-KX and Base-KX4 types which are the
new IEEE replacements for the PICMG 3.0 Base-BX and Base-BX4 types.
This patch decodes these new types and fields and will print out
proper descriptions for each one based on PICMG 3.1 R2.0