Serial: Fix compilation for io-STM32L021

stm32-rs / stm32l0xx-hal

A hardware abstraction layer (HAL) for the STM32L0 series microcontrollers written in Rust

BSD Zero Clause License

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Closed dbrgn closed 4 years ago

dbrgn commented 4 years ago

Unfortunately a typo sneaked into the serial module in #68. This PR fixes compilation on io-STM32L021.