[architecture] Require setting SPI config in SpiDevice based drivers
          #820
        
          
      
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PR to move the discussion about a new API for setting the SPI configuration in
SpiDevicebased device drivers to a different place.As a first step a new
SpiConfigurationstruct is added underarchitecture. Furthermore,modm::SpiDevicewill take that config struct as a non-type template parameter and provides a defaultconfigureBus()function that applies the settings to the SPI master.EDIT: this does not work as expected, the platform-specific
SpiMasterdriver won't acceptmodm::Spi::DataModeas an argument toSpiMaster::setDataMode().modm::platform::SpiMaster::DataModehas to be used.