modules: lvgl: add stubs for Kconfig symbols overridden in-tree

There are several Kconfig symbols defined in the lvgl module that are
referenced from various defconfigs in the zephyr tree. If the LVGL module
is unavailable, they need to be redefined as stubs in Kconfig.lvgl.

Fixes: 6c190292c064 ("lvgl: move the lvgl glue out of the zephyr tree")
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@huawei.com>
1 file changed