firewire: Let an fw_descriptor specify a leading immediate key/value pair.

This lets us break out "Juju" as the model name in the config rom.

Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

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

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

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