ISO7816: change update_fidi to use provided USART

Also disables write protection for USART register if required

Change-Id: I716f4bc3a22800cbce402b146f14ef8b2aab2a98

firmware/libcommon/include/simtrace.h

@@ -77,7 +77,11 @@ typedef struct {
 
 extern const USBConfigurationDescriptor *configurationDescriptorsArr[];
 
-void update_fidi(uint8_t fidi);
+/*! Update USART baud rate to Fi/Di ratio
+ *  @param[io] usart USART peripheral base address
+ *  @param[in] fidi FiDi value as provided in TA interface byte
+ */
+void update_fidi(Usart_info *usart, uint8_t fidi);
 
 void ISR_PhoneRST( const Pin *pPin);