ieee1394: ohci1394: fix endianess bug in debug message

The transaction labels were misprinted int the debug printk "Packet
received from node..." due two byte-swapping once too often.  Affected
were big endian machines, except UniNorth based ones.  Fix tested by
Wolfgang Pfeiffer.

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