stm32f405: Rename structs and functions

Signed-off-by: Alistair Francis <alistair23@gmail.com>
stm32f405_usart: Change the input function to a blocking one

Signed-off-by: Alistair Francis <alistair23@gmail.com>
stm32f405_adc: Change the randomous of the ADC in

Signed-off-by: Alistair Francis <alistair23@gmail.com>
stm32f405: Remove the xx from all files

Signed-off-by: Alistair Francis <alistair23@gmail.com>