scsi: libsas: Declare sas_discover_end_dev() static

sas_discover_end_dev() is defined and used only in sas_discover.c. Define
this function as static.

Signed-off-by: Damien Le Moal <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Reviewed-by: John Garry <[e-mail]>
Reviewed-by: Johannes Thumshirn <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/libsas/sas_discover.c

···
  *
  * See comment in sas_discover_sata().
  */
-int sas_discover_end_dev(struct domain_device *dev)
+static int sas_discover_end_dev(struct domain_device *dev)
 {
 	return sas_notify_lldd_dev_found(dev);
 }

include/scsi/libsas.h

···
 sas_domain_attach_transport(struct sas_domain_function_template *);
 extern struct device_attribute dev_attr_phy_event_threshold;
 
-int  sas_discover_end_dev(struct domain_device *);
-
 void sas_task_abort(struct sas_task *);
 int sas_eh_abort_handler(struct scsi_cmnd *cmd);
 int sas_eh_device_reset_handler(struct scsi_cmnd *cmd);