[c-nsp] CatOS third-party SFP support

[Anton Kapela]

> It probably doesn't exist. Note that "service 
> unsupported-transceiver" is a fairly recent addition, it 
> didn't exist at all before IOS SXE (after enough people 
> complained about this asinine policy apparently). If you 
> wanted to run 3rd party SFPs or XENPAKs in say SXD, you were SOL.

I suspect the revenue lost by supporting non-cisco SFP's has been made
up for by the 500% overpriced Cisco-braded CF modules sold (so you can
run SXE and later), given that SXD appears to be the end of line for
images that will fit into default sup720 flash/bootflash. 

-Tk