[SCSI] zfcp: Remove useless assignment

Using a bitwise OR to not set anything at all is pointless so remove
the useless statement.

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>