message: Fix cfg syntax
diff: @@ -48,9 +48,9 @@ mod vga;
  #[cfg(not(test))]
  global_asm!(include_str!("start.s"));
  -#[cfg(all(not(test), not(fsgsbase)))]
  +#[cfg(all(not(test), not(feature = "fsgsbase")))]
  global_asm!(include_str!("switch.s"));
  -#[cfg(all(not(test), fsgsbase))]
  +#[cfg(all(not(test), feature = "fsgsbase"))]
  global_asm!(include_str!("switch_fsgsbase.s"));
  const SERIAL_PORT_BAUDRATE: u32 = 115_200;
  