Peripheral: Rename SimpleSpi to SpiSimpleMaster in Interface.
Peripheral: Rename SimpleSpi to SpiSimpleMaster in Interface.

chrism333/xpcc,chrism333/xpcc,dergraaf/xpcc,dergraaf/xpcc,dergraaf/xpcc,chrism333/xpcc,chrism333/xpcc,dergraaf/xpcc