pasemi_mac: Minor cleanup / define fixes

* Remove some unused defines
* Fix a couple of wrong chip register defines, and add a few more fields
  that might be used in the near future.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

diff --cc drivers/net/pasemi_mac.c
Simple merge

diff --cc drivers/net/pasemi_mac.h
Simple merge