AP_Param: Unify from print or println to printf.

libraries/AP_Param/AP_Param.cpp

@@ -967,7 +967,7 @@ bool AP_Param::save(bool force_save)
 
     if (ofs+type_size((enum ap_var_type)phdr.type)+2*sizeof(phdr) >= _storage.size()) {
         // we are out of room for saving variables
-        hal.console->println("EEPROM full");
+        hal.console->printf("EEPROM full\n");
         return false;
     }