Add support for ALKSESP32 board variant

Author: cleveHEX

src/ALKS.h

@@ -71,6 +71,8 @@ static const uint8_t S3 = 9;
 static const uint8_t S4 = 10;
 static const uint8_t S5 = 11;
 
+#elif defined(alksesp32) // Hook from esp32 alks variant
+
 #elif defined(ESP32)
 static const uint8_t D0 = 40;
 static const uint8_t D1 = 41;