vfs: fix a fallthrough comment to silence the warning
@@ -443,7 +443,9 @@ static int uart_tcsetattr(int fd, int optional_actions, const struct termios *p)
errno = EINVAL;
return -1;
}
- // intentional fall-through to the next case
+
+ /* FALLTHRU */
+
case TCSAFLUSH:
if (uart_flush_input(fd) != ESP_OK) {
errno = EINVAL;
