Support the new Arduino UNOR4 boards

As mentioned on the Arduino forum, the library would not compile on the new boards.
https://forum.arduino.cc/t/not-working-in-combination-with-adafruit-st7789/1145046

```
Adafruit_ST77xx.cpp:29:10: fatal error: wiring_private.h: No such file or directory
 #include "wiring_private.h"
```

So updated the conditional for the STM32_FEATHER to also not include it for these new boards

Adafruit_ST77xx.cpp

@@ -24,10 +24,12 @@
 
 #include "Adafruit_ST77xx.h"
 #include <limits.h>
-#ifndef ARDUINO_STM32_FEATHER
+#if !defined(ARDUINO_STM32_FEATHER) && !defined(ARDUINO_UNOR4_WIFI)
+#if !defined(ARDUINO_UNOR4_MINIMA)
 #include "pins_arduino.h"
 #include "wiring_private.h"
 #endif
+#endif
 #include <SPI.h>
 
 #define SPI_DEFAULT_FREQ 32000000 ///< Default SPI data clock frequency