Incorrect GPIO documentation

[daniel-mooney]

These pertains to the official doc.rs page which can be found here. I was unsure where else I could make an issue.

The example for accessing a GPIO pin is given as:

// Acquire the GPIOC peripheral
// NOTE: `dp` is the device peripherals from the `PAC` crate
let mut gpioa = dp.GPIOA.split();

To my best knowledge, this is incorrect. split() must recieve an argument for the Reset and Clock Control:

pub trait GpioExt {
    type Parts;

    // Required method
    fn split(self, rcc: &mut RCC) -> Self::Parts;
}