I2c DMA: move common traits for I2C DMA in prelude

Also adapt example to changes

Author: SpeedCrash100

examples/stopwatch-with-ssd1306-and-interrupts-and-dma-i2c.rs

@@ -24,7 +24,7 @@ use stm32f4xx_hal as hal;
 use crate::hal::{
     dma::{Stream1, StreamsTuple},
     gpio::*,
-    i2c::dma::{I2CMasterDma, I2CMasterHandleIT, I2CMasterWriteDMA, NoDMA, TxDMA},
+    i2c::dma::{I2CMasterDma, NoDMA, TxDMA},
     i2c::I2c,
     interrupt, pac,
     pac::{DMA1, I2C1},

src/prelude.rs

@@ -63,6 +63,10 @@ pub use crate::dac::DacExt as _stm32f4xx_hal_dac_DacExt;
 pub use crate::gpio::outport::OutPort as _;
 pub use crate::gpio::ExtiPin as _stm32f4xx_hal_gpio_ExtiPin;
 pub use crate::gpio::GpioExt as _stm32f4xx_hal_gpio_GpioExt;
+pub use crate::i2c::dma::I2CMasterHandleIT as _stm32f4xx_hal_i2c_dma_I2CMasterHandleIT;
+pub use crate::i2c::dma::I2CMasterReadDMA as _stm32f4xx_hal_i2c_dma_I2CMasterReadDMA;
+pub use crate::i2c::dma::I2CMasterWriteDMA as _stm32f4xx_hal_i2c_dma_I2CMasterWriteDMA;
+pub use crate::i2c::dma::I2CMasterWriteReadDMA as _stm32f4xx_hal_i2c_dma_I2CMasterWriteReadDMA;
 pub use crate::i2c::I2cExt as _stm32f4xx_hal_i2c_I2cExt;
 pub use crate::i2s::I2sExt as _stm32f4xx_hal_i2s_I2sExt;
 pub use crate::qei::QeiExt as _stm32f4xx_hal_QeiExt;