[SCSI] zfcp: Keep ccw device and model id in zfcp_ccw.c

Keep the information about the device and model id in zfcp_ccw. This
requires an additional helper function to check for the privileged
cfdc subchannel, but it allows the removal of the redundant defines
from the zfcp_def header file.

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@HansenPartnership.com>

drivers/s390/scsi/zfcp_ext.h

@@ -27,6 +27,7 @@ extern int zfcp_sg_setup_table(struct scatterlist *, int);
 
 /* zfcp_ccw.c */
 extern int zfcp_ccw_register(void);
+extern int zfcp_ccw_priv_sch(struct zfcp_adapter *);
 extern struct zfcp_adapter *zfcp_get_adapter_by_busid(char *);
 
 /* zfcp_cfdc.c */