Support for muzi works R1 Neo device.

Support for R1 Neo hardware. New variant and baseboard class.
* Known issues:
  - power management is not currently supported
  - power off via long button press is not implemented

Add support for Epson Seiko RX8130CE I2C Real-time clock.

variants/muziworks_r1_neo/R1NeoBoard.h

@@ -0,0 +1,55 @@
+#pragma once
+
+#include <MeshCore.h>
+#include <Arduino.h>
+#include <helpers/NRF52Board.h>
+#include "NullDisplayDriver.h"
+#include "MomentaryButton.h"
+
+#define DISPLAY_CLASS NullDisplayDriver
+
+class R1NeoBoard : public NRF52BoardDCDC {
+protected:
+#ifdef NRF52_POWER_MANAGEMENT
+  void initiateShutdown(uint8_t reason) override;
+#endif
+
+public:
+  R1NeoBoard() : NRF52Board("R1NEO_OTA") {}
+  void begin();
+
+#if defined(P_LORA_TX_LED)
+  void onBeforeTransmit() override {
+    digitalWrite(P_LORA_TX_LED, HIGH);   // turn TX LED on
+    #if defined(LED_BLUE)
+       // turn off that annoying blue LED before transmitting
+       digitalWrite(LED_BLUE, LOW);
+    #endif
+  }
+  void onAfterTransmit() override {
+    digitalWrite(P_LORA_TX_LED, LOW);   // turn TX LED off
+    #if defined(LED_BLUE)
+       // do it after transmitting too, just in case
+       digitalWrite(LED_BLUE, LOW);
+    #endif
+  }
+#endif
+
+  #define BATTERY_SAMPLES 8
+
+  uint16_t getBattMilliVolts() override {
+    analogReadResolution(12);
+
+    uint32_t raw = 0;
+    for (int i = 0; i < BATTERY_SAMPLES; i++) {
+      raw += analogRead(PIN_VBAT_READ);
+    }
+    raw = raw / BATTERY_SAMPLES;
+
+    return (ADC_MULTIPLIER * raw) / 4096;
+  }
+
+  const char* getManufacturerName() const override {
+    return "muzi works R1 Neo";
+  }
+};