Karl Palsson 9d709e52b4 stm32: usart: move USARTX definitions to target/version specific
Instead of declaring that _every_ device has USART1,2,3 and UART4,5, let
the targets themselves define what periphs they do, along with their
USARTx_BASE defines, and let the common headers just have the common
abstractions.
2017-10-25 22:55:09 +00:00
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