[dev_asynch_i2c] Enable asynch I2C on NUCLEO_F411RE

Dev Asynch I2c
One limitation linked to HAL bug:
Master RX(Repeated Start) KO

Author: Erwan GOURIOU

hal/targets/hal/TARGET_STM/TARGET_STM32F4/TARGET_NUCLEO_F411RE/objects.h

@@ -76,7 +76,17 @@ struct spi_s {
 
 struct i2c_s {
     I2CName  i2c;
+    I2C_HandleTypeDef handle;
+    IRQn_Type event_i2cIRQ;
+    IRQn_Type error_i2cIRQ;
     uint32_t slave;
+#if DEVICE_I2C_ASYNCH
+    uint32_t event;
+    uint32_t address;
+    uint32_t stop;
+    uint32_t available_events;
+    uint32_t XferOperation;
+#endif
 };
 
 #include "common_objects.h"