Fix for Heltec Lora V3 3.2 board (#144)

* attempt at getting the spi issues fixed

* Fix for Heltec Lora V3 (v3.2) variant

* Better warning message

lib/comms/bus.cpp

@@ -20,12 +20,15 @@ bool initUARTs(Config &config)
     return true;
 }
 
+#ifndef HELTEC
 SPIClass &hspi = *(new SPIClass(HSPI)); // not usable until initSPIs
+#endif
 
 bool initSPIs(Config &config)
 {
     if (config.spi1.enabled)
     {
+#ifndef HELTEC
         delete (&hspi);
         hspi = *(new SPIClass(config.spi1.bus_num));
         if (config.spi1.clock_freq > 0)
@@ -35,10 +38,14 @@ bool initSPIs(Config &config)
 
         // if all the pins are -1, then will use the default for SPI bus_num
         hspi.begin(config.spi1.clk, config.spi1.miso, config.spi1.mosi);
+
         Serial.printf("Initialized SPI%d @ %x: SC:%d MISO:%d MOSI:%d clock:%d\n",
                       (int)config.spi1.bus_num, (void *)&hspi, (int)config.spi1.clk,
                       (int)config.spi1.miso, (int)config.spi1.mosi,
                       (int)config.spi1.clock_freq);
+#else
+        Serial.println("Custom SPI initializer not supported on Heltec");
+#endif
     }
 
     return true;