lvgl: Upgrade to LVGL 9 series

Upgrade LVGL and matching recipes to LVGL 9 series. Use latest git HEAD
instead of 9.0.0 release to pull in fixes which landed after the 9.0.0
release and which are of interest to Linux deployments.

There are significant breaking changes, which are listed below.

The lv-drivers and lv-lib-png PNG library seem to be part of the main LVGL
repository, drop the now unnecessary recipes.

Configuration is now done in lv_conf.h only, there is no more lv_drv_conf.h,
rework lv-drivers.inc accordingly. USE_SDL_GPU support has been renamed to
LV_USE_DRAW_SDL and newly depends on libsdl2-image, SDL_DOUBLE_BUFFERED to
LV_SDL_BUF_COUNT=2 .

All configuration options from lvgl_%.bb, LV_COLOR_DEPTH, LV_MEM_CUSTOM as
well as LV_TICK_CUSTOM, LV_TICK_CUSTOM_INCLUDE, LV_TICK_CUSTOM_SYS_TIME_EX
are all moved into lv-drivers.inc , so the configuration is done in one
place, using the same set of configuration options.

Wayland support is gone, drop it from lv-drivers.inc. Evdev input device
selection via EVDEV_NAME is also gone, the selection is now done using
API call lv_evdev_create(). DRM card selection via DRM_CARD is also gone,
the selection is now done using API call lv_linux_drm_set_file(). Move
LVGL_CONFIG_DRM_CARD into lvgl-demo-fb, which calls lv_linux_drm_set_file().

The lvgl-demo-fb recipe is adjusted to be compatible with LVGL 9 again,
this makes some of the sed adjustments really awful, so this part will
be replaced by upstream patches in a separate commit to avoid growing
this commit even more.

The lvgl-demo-fb recipe is also no longer using git submodules, but
instead fetches both its source and LVGL using git fetcher separately.
This is needed to build the SDL backend successfully, which requires
newer LVGL than what the repository points to via its submodule.

Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

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