dma: Remove feature restriction in prelude

Author: Sh3Rm4n

src/prelude.rs

@@ -8,7 +8,6 @@
 //! use stm32f3xx-hal::prelude::*;
 //! ```
 
-#[cfg(any(feature = "stm32f302", feature = "stm32f303"))]
 pub use crate::dma::DmaExt as _stm32f3xx_hal_dma_DmaExt;
 pub use crate::flash::FlashExt as _stm32f3xx_hal_flash_FlashExt;
 pub use crate::gpio::GpioExt as _stm32f3xx_hal_gpio_GpioExt;