[TOKENRING]: expire timer improvements.

[TOKENRING]: expire timer improvements.

Cleanup the timer code.  It works as is, but:
- use timer_ macro's when working with jiffies.
- cleanup the #define's
- make timer run sooner (ie when next entry will expire)
  rather than waiting till the next 10 minute quanta.
- print TTL value in seconds not jiffies
- change formatting to linux style in code the area affected.