scsi: 53c700: Remove snprintf() from sysfs call-backs and replace with sysfs_emit()

Since snprintf() has the documented, but still rather strange trait of
returning the length of the data that *would have been* written to the
array if space were available, rather than the arguably more useful
length of data *actually* written, it is usually considered wise to use
something else instead in order to avoid confusion.

In the case of sysfs call-backs, new wrappers exist that do just that.

[mkp: removed unrelated whitespace cleanups]

Link: https://lwn.net/Articles/69419/
Link: KSPP/linux#105
Cc: Richard Hirst <[email protected]>
Signed-off-by: Lee Jones <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Martin K. Petersen <[email protected]>

Author: lag-linaro

drivers/scsi/53c700.c

@@ -2071,7 +2071,7 @@ NCR_700_show_active_tags(struct device *dev, struct device_attribute *attr, char
 {
 	struct scsi_device *SDp = to_scsi_device(dev);
 
-	return snprintf(buf, 20, "%d\n", NCR_700_get_depth(SDp));
+	return sysfs_emit(buf, "%d\n", NCR_700_get_depth(SDp));
 }
 
 static struct device_attribute NCR_700_active_tags_attr = {