Add R61581 driver as detailed in #238

Not tested by Bodmer, tested by s60sc as in #238

TFT_eSPI.cpp

@@ -361,6 +361,9 @@ void TFT_eSPI::init(uint8_t tc)
 #elif defined (ST7789_DRIVER)
     #include "TFT_Drivers/ST7789_Init.h"
 
+#elif defined (R61581_DRIVER)
+    #include "TFT_Drivers/R61581_Init.h"
+
 #endif
 
   spi_end();
@@ -409,6 +412,9 @@ void TFT_eSPI::setRotation(uint8_t m)
 #elif defined (ST7789_DRIVER)
     #include "TFT_Drivers/ST7789_Rotation.h"
 
+#elif defined (R61581_DRIVER)
+    #include "TFT_Drivers/R61581_Rotation.h"
+
 #endif
 
   delayMicroseconds(10);