Fix a da(4) driver memory leak for SCSI SMR devices.

In the probe case for SCSI SMR Host Aware or Most Managed drives, be sure
to free allocated memory.

sys/cam/scsi/scsi_da.c:
	In dadone_probezone(), free the data pointer before returning.

MFC after:	3 days
Sponsored by:	Spectra Logic
Approved by:	re (kib)

sys/cam/scsi/scsi_da.c

@@ -5674,6 +5674,9 @@ dadone_probezone(struct cam_periph *periph, union ccb *done_ccb)
 			}
 		}
 	}
+
+	free(csio->data_ptr, M_SCSIDA);
+
 	daprobedone(periph, done_ccb);
 	return;
 }