Merge IoTThinks PR #19 LR1110 DC/DC

# Conflicts:
#	src/helpers/radiolib/CustomLR1110.h

src/helpers/radiolib/CustomLR1110.h

@@ -26,6 +26,8 @@ class CustomLR1110 : public LR1110 {
       int16_t state = LR1110::begin(freq, bw, sf, cr, syncWord, power, preambleLength,
                                     tcxoVoltage);
       if (state == RADIOLIB_ERR_NONE) state = applyMeshCoreTcxoDelay();
+      // RadioLib begin() defaults to LDO; use the LR1110 DC/DC regulator.
+      if (state == RADIOLIB_ERR_NONE) state = setRegulatorDCDC();
       return state;
     }