Use drm_crtc_from_index() to find drm_crtc for given index, so that we
do not need to maintain a pointer array in struct exynos_drm_private.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1483961145-18453-2-git-send-email-shawnguo@kernel.org