Input: synaptics-rmi4 - convert to use sysfs_emit() APIs

Follow the advice of the Documentation/filesystems/sysfs.rst and show()
should only use sysfs_emit() or sysfs_emit_at() when formatting the value
to be returned to user space.
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: zhang songyi <zhang.songyi@zte.com.cn>
Link: https://lore.kernel.org/r/20220927070936.258300-1-zhang.songyi@zte.com.cnSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/rmi4/rmi_f34.c

@@ -321,13 +321,13 @@ static ssize_t rmi_driver_bootloader_id_show(struct device *dev,
 		f34 = dev_get_drvdata(&fn->dev);
 
 		if (f34->bl_version == 5)
-			return scnprintf(buf, PAGE_SIZE, "%c%c\n",
-					 f34->bootloader_id[0],
-					 f34->bootloader_id[1]);
+			return sysfs_emit(buf, "%c%c\n",
+					  f34->bootloader_id[0],
+					  f34->bootloader_id[1]);
 		else
-			return scnprintf(buf, PAGE_SIZE, "V%d.%d\n",
-					 f34->bootloader_id[1],
-					 f34->bootloader_id[0]);
+			return sysfs_emit(buf, "V%d.%d\n",
+					  f34->bootloader_id[1],
+					  f34->bootloader_id[0]);
 	}
 
 	return 0;
@@ -346,7 +346,7 @@ static ssize_t rmi_driver_configuration_id_show(struct device *dev,
 	if (fn) {
 		f34 = dev_get_drvdata(&fn->dev);
 
-		return scnprintf(buf, PAGE_SIZE, "%s\n", f34->configuration_id);
+		return sysfs_emit(buf, "%s\n", f34->configuration_id);
 	}
 
 	return 0;
@@ -499,7 +499,7 @@ static ssize_t rmi_driver_update_fw_status_show(struct device *dev,
 	if (data->f34_container)
 		update_status = rmi_f34_status(data->f34_container);
 
-	return scnprintf(buf, PAGE_SIZE, "%d\n", update_status);
+	return sysfs_emit(buf, "%d\n", update_status);
 }
 
 static DEVICE_ATTR(update_fw_status, 0444,