next-20141215 build failures due to DT DRM driver

On Mon, Dec 15, 2014 at 08:08:21AM +0000, Build bot for Mark Brown wrote:

arm-allmodconfig ERROR: "sti_hqvdp_create" [drivers/gpu/drm/sti/sticompositor.ko] undefined! ERROR: "sti_drm_plane_init" [drivers/gpu/drm/sti/sti_hqvdp.ko] undefined! ERROR: "sti_layer_create" [drivers/gpu/drm/sti/sti_hqvdp.ko] undefined! ERROR: "sti_layer_to_str" [drivers/gpu/drm/sti/sti_hqvdp.ko] undefined!

Today's ARM allmodconfig failed to build in -next due to the ST DRM drivers, they build several modules which reference each other but several of the symbols are not exported, leading to build failures. I'll send a patch shortly.