Add kernel drivers for SPI and UART and make locking APIs more consistent (#489)

- Add kernel support for SPI driver
- Add kernel support for UART driver
- Implemented ESP32 UART kernel driver
- Update existing UART-related code in Tactility to use new kernel driver
- Remove UART from tt::hal::Configuration
- Remove tt_hal_uart functionality but keep functions for now
- Update devicetrees for UART changes
- Kernel mutex and recursive mutex: improved locking API design
- Other kernel improvements
- Added device_exists_of_type() and device_find_by_name()

Tactility/Source/app/gpssettings/GpsSettings.cpp

@@ -292,14 +292,18 @@ class GpsSettingsApp final : public App {
                 lv_obj_add_flag(statusLabelWidget, LV_OBJ_FLAG_HIDDEN);
             }
 
-            lv_obj_clean(gpsConfigWrapper);
-            std::vector<tt::hal::gps::GpsConfiguration> configurations;
-            auto gps_service = tt::service::gps::findGpsService();
-            if (gps_service && gps_service->getGpsConfigurations(configurations)) {
-                int index = 0;
-                for (auto& configuration : configurations) {
-                    createGpsView(configuration, index++);
+            if (!lv_obj_has_flag(gpsConfigWrapper, LV_OBJ_FLAG_HIDDEN)) {
+                lv_obj_clean(gpsConfigWrapper);
+                std::vector<tt::hal::gps::GpsConfiguration> configurations;
+                auto gps_service = tt::service::gps::findGpsService();
+                if (gps_service && gps_service->getGpsConfigurations(configurations)) {
+                    int index = 0;
+                    for (auto& configuration : configurations) {
+                        createGpsView(configuration, index++);
+                    }
                 }
+            } else {
+                lv_obj_clean(gpsConfigWrapper);
             }
         }
     }