Cleanup EEPROM reset and validation methods so that it is obvious what

the code is doing.  There are now no EEPROM read/write/reset/verify
methods that take any arguments which removes magic boolean variables
from method signatures.

This also removes duplicate code in the cliDefaults and cliSave commands
which results in smaller code also also due to the deduplication of a
reboot message.

src/main.c

@@ -38,7 +38,7 @@ int main(void)
     systemInit();
     initPrintfSupport();
 
-    checkFirstTime(false);
+    ensureEEPROMContainsValidData();
     readEEPROM();
 
     // configure power ADC