[arduino][stm32l475] enable i2c4 bus (#5608)

* [Arduino][stm32l475] enable i2c bus device

* 增加默认i2c总线设备名称

bsp/stm32/stm32l475-atk-pandora/applications/arduino/pins_arduino.h

@@ -18,6 +18,8 @@
 #define ARDUINO_PINOUT_ADC_MAX  6  /* Arduino UNO has 6 ADC pins */
 #define ARDUINO_PINOUT_PWM_MAX  5  /* Arduino UNO has 5 PWM pins */
 
+#define ARDUINO_DEFAULT_IIC_BUS_NAME "i2c4"
+
 #define A0   (14)
 #define A1   (15)
 #define A2   (16)

bsp/stm32/stm32l475-atk-pandora/board/Kconfig

@@ -25,6 +25,8 @@ menu "Onboard Peripheral Drivers"
         select BSP_USING_PWM4_CH3
         select BSP_USING_ADC
         select BSP_USING_ADC1
+        select BSP_USING_I2C
+        select BSP_USING_I2C4
         default n
 
     config BSP_USING_KEY