DmaChannel::set_priority doesn't work anymore

[Dominaezzz]

Bug description

Since #2545 landed, it's no longer possible to set the priority on DMA channel, due to the lazy init semantics.
set_priority is ignored by the hardware due to the DMA peripheral being disabled/"in reset" until a driver is made with it.
There's also the additional consequence that even if set_priority worked, the setting would be cleared when all the DMA drivers are dropped, even though the channel peripheral object might still be alive, so the user won't even realise that this has happened.

To Reproduce

        let dma_channel = peripherals.DMA_CH0;

        let in_pri = unsafe { esp32c6::DMA::steal().ch(0).in_pri().read().rx_pri().bits() };
        defmt::println!("IN_PRI = {} (before setting)", in_pri);

        dma_channel.set_priority(DmaPriority::Priority3);

        let in_pri = unsafe { esp32c6::DMA::steal().ch(0).in_pri().read().rx_pri().bits() };
        defmt::println!("IN_PRI = {} (after setting)", in_pri);

        let pio =
            ParlIoTxOnly::new(ctx.parl_io, ctx.dma_channel, tx_descriptors, 10.MHz()).unwrap();

        let in_pri = unsafe { esp32c6::DMA::steal().ch(0).in_pri().read().rx_pri().bits() };
        defmt::println!("IN_PRI = {} (after driver is made)", in_pri);

IN_PRI = 0 (before setting)
IN_PRI = 0 (after setting)
IN_PRI = 0 (after driver is made)

To get anything other than zero, I either have to use the PAC like this, after the driver is made.

        unsafe { esp32c6::DMA::steal().ch(0).in_pri().write(|w| w.rx_pri().bits(3)) };

Or throwaway a channel to make the initialisation happen earlier.

        let lol = esp_hal::dma::Channel::new(peripherals.DMA_CH2);
        core::mem::forget(lol);

Expected behavior

Setting the priority should work and stick around until the channel peripheral itself is dropped.

I think the previous Dma::new should come back (only on GDMA chips) the semantics are much clearer with that imo
Makes it more obvious when the channels are alive or not.

Environment

• Target device: ESP32-C6 (though this should apply to any GDMA chip)
• Crate name and version: esp-hal 0.23.1 (though I used main at the time of writing)