fix possible redefine warning

Author: Jason2866

lib/lib_display/UDisplay/include/uDisplay_config.h

@@ -20,7 +20,9 @@ extern SPIClass *SpiBegin(uint32_t bus);
 #endif  // _TASMOTA_H_
 
 // Enable universal touch support
+#ifndef USE_UNIVERSAL_TOUCH
 #define USE_UNIVERSAL_TOUCH
+#endif
 
 enum uColorType { uCOLOR_BW, uCOLOR_COLOR };