drm/exynos: define to_exynos_plane macro

Add macro to get struct exynos_plane from struct drm_plane pointer.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
1 file changed