Unify settings for each model into once place

source/Core/Src/Settings.cpp

@@ -15,6 +15,12 @@
 #include <string.h> // for memset
 bool sanitiseSettings();
 
+#ifdef POW_QC_20V
+#define QC_SETTINGS_MAX 3
+#else
+#define QC_SETTINGS_MAX 2
+#endif
+
 /*
  * This struct must be a multiple of 2 bytes as it is saved / restored from
  * flash in uint16_t chunks