PinGroup::read always reads from bank 0

[jannic]

The setters in PinGroup carefully select the correct bank to write to, e.g.:

    pub fn set(&mut self, state: PinState) {
        use super::pin::pin_sealed::PinIdOps;
        let mask = self.0.write_mask();
        let head_id = self.0.head.borrow().id();
        if state == PinState::Low {
            head_id.sio_out_clr().write(|w| unsafe { w.bits(mask) });
        } else {
            head_id.sio_out_set().write(|w| unsafe { w.bits(mask) });
        }
    }

However, read() always reads bank 0:

    pub fn read(&self) -> u32 {
        let mask = self.0.read_mask();
        crate::sio::Sio::read_bank0() & mask
    }