Add driver.menu-ctx->frame triggering inside gl_frame function -

Lakka GL iteration should be invoked here instead of the ifdef.

Currently delta animation goes way too slow if 'frame' function of
lakka driver is hooked up properly - hence the #LAKKA hack is still
in place.

gfx/gl.c

@@ -1514,6 +1514,9 @@ static bool gl_frame(void *data, const void *frame, unsigned width, unsigned hei
    gl_set_prev_texture(gl, &tex_info);
 
 #if defined(HAVE_MENU)
+   if (g_extern.lifecycle_state & (1ULL << MODE_MENU) && driver.menu_ctx && driver.menu_ctx->frame)
+      driver.menu_ctx->frame(gl);
+
    if (gl->rgui_texture_enable)
       #if defined(HAVE_LAKKA)
          lakka_render(gl);