scsi: core: Correct documentation for scsi_test_unit_ready()

If scsi_test_unit_ready() returns zero, TEST UNIT READY was executed
successfully.

Signed-off-by: Miao Li <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Martin K. Petersen <[email protected]>

Author: Miao Li

drivers/scsi/scsi_lib.c

@@ -2459,7 +2459,7 @@ EXPORT_SYMBOL(scsi_mode_sense);
  *	@retries: number of retries before failing
  *	@sshdr: outpout pointer for decoded sense information.
  *
- *	Returns zero if unsuccessful or an error if TUR failed.  For
+ *	Returns zero if successful or an error if TUR failed.  For
  *	removable media, UNIT_ATTENTION sets ->changed flag.
  **/
 int