Refactor for e-h v1.0.0-alpha#172

ryankurte wants to merge 3 commits intostm32-rs:masterstm32-rs/stm32f4xx-hal:masterfrom

ryankurte:embedded-hal-v1.0.0-alpharyankurte/stm32f4xx-hal:embedded-hal-v1.0.0-alphaCopy head branch name to clipboard