firewire: remove unused struct members

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

diff --cc drivers/firewire/fw-card.c
Simple merge

diff --cc drivers/firewire/fw-device.h
Simple merge

diff --cc drivers/firewire/fw-ohci.c
Simple merge

diff --cc drivers/firewire/fw-transaction.h
Simple merge