Cpld autodetect & boot splash screen (#1888)

* added delayed error message when hackrf cpld initialization fails

* refactoring

* implemented portapack cpld autodetection

* refactoring

* fixed valid config range

* added lcd fast setup

* added boot splash screen

* added one frame delay to remove flickering

* fixed config persistence

firmware/common/lcd_ili9341.hpp

@@ -42,6 +42,8 @@ class ILI9341 {
     ILI9341(ILI9341&&) = delete;
     void operator=(const ILI9341&) = delete;
 
+    bool read_display_status();
+
     void init();
     void shutdown();