In the only two existing files using the old tcp_optlen() function,
clean up confusing and inconsistent mixing of both byte and word
offsets.  Document assumptions.

No semantic changes.  The drivers should function exactly as existing.
Untested.  No response from testers in 9+ weeks.

Requires:
   TCPCT part 2a: TCP header pointer functions

Signed-off-by: William.Allen.Simpson@gmail.com
CC: Michael Chan <mchan@broadcom.com>
---
  drivers/net/bnx2.c  |   26 +++++++++++++--------
  drivers/net/tg3.c   |   59 ++++++++++++++++++++++++++-------------------------
  include/linux/tcp.h |    5 ----
  3 files changed, 46 insertions(+), 44 deletions(-)