fix bug in CanPinInitialiser for F4 devices
fix bug in CanPinInitialiser for F4 devices

punkkeks/stm32plus,spiralray/stm32plus,spiralray/stm32plus,punkkeks/stm32plus,spiralray/stm32plus,spiralray/stm32plus,spiralray/stm32plus,punkkeks/stm32plus,spiralray/stm32plus,punkkeks/stm32plus,punkkeks/stm32plus,punkkeks/stm32plus,spiralray/stm32plus,punkkeks/stm32plus