drm/tilcdc: Force building of DRM_TILCDC_SLAVE_COMPAT
drm/tilcdc: Force building of DRM_TILCDC_SLAVE_COMPAT

If I read Documentation/kbuild/makefiles.txt section 3.6 right, this
patch should not be needed. However, without this patch the objects
needed for DRM_TILCDC_SLAVE_COMPAT are not linked, if DRM_TILCDC is
built as module.

Signed-off-by: Jyri Sarha <e4dfba208fcd45abd4fae1b9b3d55ae818ddca52@ti.com>
Acked-by: Tomi Valkeinen <e1ca4dbb8be1acaf20734fecd2da10ed1d46a9bb@ti.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs