More explicit guards for attempting to set RTC (#4452)

* Guard against timesources from the mesh if we have good time

* Trunk

* Consider phone time in the past 24 hours authoritative as well

* Rename

* GPS can be null

* Declaration

* Remove RemoteHardware

* Explicitly remove GPS

* Exclude GPS earlier for RAK2560

src/gps/RTC.cpp

@@ -6,6 +6,7 @@
 #include <time.h>
 
 static RTCQuality currentQuality = RTCQualityNone;
+uint32_t lastSetFromPhoneNtpOrGps = 0;
 
 RTCQuality getRTCQuality()
 {
@@ -121,6 +122,9 @@ bool perhapsSetRTC(RTCQuality q, const struct timeval *tv, bool forceUpdate)
     if (shouldSet) {
         currentQuality = q;
         lastSetMsec = now;
+        if (currentQuality >= RTCQualityNTP) {
+            lastSetFromPhoneNtpOrGps = now;
+        }
 
         // This delta value works on all platforms
         timeStartMsec = now;