HID: displays: convert sysfs sprintf/snprintf family to sysfs_emit

Fix the following coccicheck warning:

./drivers/hid/hid-roccat-arvo.c:45:8-16: WARNING: use scnprintf or
sprintf.

./drivers/hid/hid-roccat-arvo.c:95:8-16: WARNING: use scnprintf or
sprintf.

./drivers/hid/hid-roccat-arvo.c:149:8-16: WARNING: use scnprintf or
sprintf.

Reported-by: Abaci Robot<[e-mail]>
Signed-off-by: Jiapeng Chong <[e-mail]>
Signed-off-by: Jiri Kosina <[e-mail]>

drivers/hid/hid-roccat-arvo.c

···
 	if (retval)
 		return retval;
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", temp_buf.state);
+	return sysfs_emit(buf, "%d\n", temp_buf.state);
 }
 
 static ssize_t arvo_sysfs_set_mode_key(struct device *dev,
···
 	if (retval)
 		return retval;
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", temp_buf.key_mask);
+	return sysfs_emit(buf, "%d\n", temp_buf.key_mask);
 }
 
 static ssize_t arvo_sysfs_set_key_mask(struct device *dev,
···
 	struct arvo_device *arvo =
 			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", arvo->actual_profile);
+	return sysfs_emit(buf, "%d\n", arvo->actual_profile);
 }
 
 static ssize_t arvo_sysfs_set_actual_profile(struct device *dev,