stm32f045_timer: Move the pan/tilt calcs to the write func

Signed-off-by: Alistair Francis <alistair23@gmail.com>
stm32f405_adc: Correct the bit resolution of the ADC

Signed-off-by: Alistair Francis <alistair23@gmail.com>
stm32f405_adc: Small changes to match the hardware

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