Function nucleo_f446re::start

pub(crate) unsafe fn start(
) -> (&'static Kernel, NucleoF446RE, &'static Stm32f4xx<'static, Stm32f446reDefaultPeripherals<'static>>)

This is in a separate, inline(never) function so that its stack frame is removed when this function returns. Otherwise, the stack space used for these static_inits is wasted.