[Arduino_CAN] fix regression introduced in #296. (#300)

Author: aentinger

libraries/Arduino_CAN/src/R7FA6M5_CAN.cpp

@@ -100,6 +100,11 @@ R7FA6M5_CAN::R7FA6M5_CAN(int const can_tx_pin, int const can_rx_pin)
  **************************************************************************************/
 
 bool R7FA6M5_CAN::begin(CanBitRate const can_bitrate)
+{
+  return begin(static_cast<uint32_t>(can_bitrate));
+}
+
+bool R7FA6M5_CAN::begin(uint32_t const can_bitrate)
 {
   bool init_ok = true;
 

libraries/Arduino_CAN/src/R7FA6M5_CAN.h

@@ -54,6 +54,7 @@ class R7FA6M5_CAN final : public HardwareCAN
 
 
   bool begin(CanBitRate const can_bitrate) override;
+  bool begin(uint32_t const can_bitrate);
   void end() override;