Tab5 audio, I2C improvements, UiDensity moved to lvgl-module and cleanup (#506)

- UiDensity moved to lvgl-module
- Deleted tt_hal and tt_hal_gpio (breaks apps, but will fix those right after merging)
- Added I2C 8 bit register operations
- Added device.properties to simulator
- Improved Tab5 hardware init, implement audio
- Add README.md to kernel

Modules/lvgl-module/source/arch/lvgl_posix.c

@@ -10,7 +10,7 @@
 
 #include <lvgl.h>
 
-#include "tactility/lvgl_module.h"
+#include <tactility/lvgl_module.h>
 
 extern struct LvglModuleConfig lvgl_module_config;
 

Modules/lvgl-module/source/module.c

@@ -60,6 +60,10 @@ bool lvgl_is_running() {
     return is_running;
 }
 
+enum UiDensity lvgl_get_ui_density(void) {
+    return TT_LVGL_UI_DENSITY;
+}
+
 struct Module lvgl_module = {
     .name = "lvgl",
     .start = start,

Modules/lvgl-module/source/symbols.c

@@ -11,6 +11,7 @@ const struct ModuleSymbol lvgl_module_symbols[] = {
     DEFINE_MODULE_SYMBOL(lvgl_try_lock),
     DEFINE_MODULE_SYMBOL(lvgl_unlock),
     DEFINE_MODULE_SYMBOL(lvgl_is_running),
+    DEFINE_MODULE_SYMBOL(lvgl_get_ui_density),
     // lvgl_fonts
     DEFINE_MODULE_SYMBOL(lvgl_get_shared_icon_font),
     DEFINE_MODULE_SYMBOL(lvgl_get_shared_icon_font_height),