The only user of Kconfig symbol EXYNOS_DEV_DRM was removed in commit 0a9d5ac307ae ("ARM: EXYNOS: removing exynos-drm device registration
from non-dt platforms"). It is safe to remove this symbol too.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>