Add internal analog channels on Teensy-LC

teensy3/analog.c

 #elif defined(__MKL26Z64__)
 static const uint8_t channel2sc1a[] = {
 	5, 14, 8, 9, 13, 12, 6, 7, 15, 11,
-	0, 4+64, 23
+	0, 4+64, 23, 26, 27
 };
 
 
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-
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 #endif
 
 
 		index = pin;      // 0-12 refer to A0-A12
 	} else if (pin >= 14 && pin <= 26) {
 		index = pin - 14; // 14-26 are A0-A12
+	} else if (pin >= 38 && pin <= 39) {
+		index = pin - 25; // 38=temperature
+		                  // 39=bandgap ref (PMC_REGSC |= PMC_REGSC_BGBE)
 	} else {
 		return 0;
 	}
 
 
 
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