eepro100: Restructure code

This patch only moves about 150 lines of code from
function eepro100_cu_command to a new function action_command.

A goto statement was replaced by a for loop.

There are no functional changes. Nor did I change comments
starting with // (they will be removed by future patches).

Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
