sky2: flow control setting fixes

The result of flow control negotiation should not limit the next
negotiatition. If board is plugged into an old half duplex 10Mbit port,
without pause, then replugged into a gigabit port, it should negotiate
what is desired, not inherit that last negotiation.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>

diff --cc drivers/net/sky2.c
Simple merge

diff --cc drivers/net/sky2.h
Simple merge