Add ADC channels to esp variants, plug code back in to make sure other archs work

src/platform/esp32/architecture.h

@@ -39,6 +39,9 @@
 #ifndef HAS_CPU_SHUTDOWN
 #define HAS_CPU_SHUTDOWN 1
 #endif
+#ifndef DEFAULT_VREF
+#define DEFAULT_VREF 1100
+#endif
 
 #if defined(HAS_AXP192) || defined(HAS_AXP2101)
 #define HAS_PMU
@@ -132,4 +135,4 @@
 #define RF95_NSS 18
 #endif
 
-#define SERIAL0_RX_GPIO 3 // Always GPIO3 on ESP32
+#define SERIAL0_RX_GPIO 3 // Always GPIO3 on ESP32