fixing IIC formatting to use spaces rather than tabs
fixing IIC formatting to use spaces rather than tabs

jgowans/stm32f0_devel,Azizou/stm32f0_devel,jgowans/stm32f0_devel,jgowans/stm32f0_devel,Azizou/stm32f0_devel,Azizou/stm32f0_devel