Merge pull request #25 from adafruit/esp8266_add

re-submit Add ESP8266 to RwReg definition w/ actions

Author: ladyada

TouchScreen.h

@@ -12,7 +12,8 @@
 typedef volatile uint8_t RwReg;
 #elif defined(ARDUINO_STM32_FEATHER)
 typedef volatile uint32 RwReg;
-#elif defined(NRF52_SERIES) || defined(ESP32) || defined(ARDUINO_ARCH_STM32)
+#elif defined(NRF52_SERIES) || defined(ESP32) || defined(ESP8266) ||           \
+    defined(ARDUINO_ARCH_STM32)
 typedef volatile uint32_t RwReg;
 #else
 typedef volatile uint32_t RwReg;