lvgl: install lv_conf.h

Add an install append to copy the generated lv_conf.h as part of the
lvgl package, so that it will be found and used by the recipes that
want to use lvgl.

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

meta-oe/recipes-graphics/lvgl/lvgl_9.0.0.bb

@@ -27,6 +27,11 @@ ALLOW_EMPTY:${PN} = "1"
 PACKAGECONFIG ??= "drm"
 require lv-conf.inc
 
+do_install:append() {
+    install -d "${D}${includedir}/${PN}"
+    install -m 0644 "${S}/lv_conf.h" "${D}${includedir}/${PN}/lv_conf.h"
+}
+
 FILES:${PN}-dev += "\
     ${includedir}/${PN}/ \
     ${includedir}/${PN}/lvgl/ \