Fix compilation error for ESP32 C3 which has only one i2c interface

Author: nicop4

src/SSD1306Wire.h

@@ -78,7 +78,7 @@ class SSD1306Wire : public OLEDDisplay {
       this->_address = address;
       this->_sda = sda;
       this->_scl = scl;
-#if !defined(ARDUINO_ARCH_ESP32)
+#if !defined(ARDUINO_ARCH_ESP32) || defined(CONFIG_IDF_TARGET_ESP32C3)
       this->_wire = &Wire;
 #else
       this->_wire = (i2cBus == I2C_ONE) ? &Wire : &Wire1;