Update heltecv2.h

src/hal/heltecv2.h

@@ -18,13 +18,13 @@
 #define HAS_BUTTON (0) // button "PROG" on board
 
 // Pins for I2C interface of OLED Display
-#define OLED_SDA (4)
-#define OLED_SCL (15)
-#define OLED_RST (16)
+#define MY_OLED_SDA (4)
+#define MY_OLED_SCL (15)
+#define MY_OLED_RST (16)
 
 // Pins for LORA chip SPI interface come from board file, we need some
 // additional definitions for LMIC
 #define LORA_IO1  (35)
 #define LORA_IO2  (34)
 
-#endif
+#endif