drm/sti: remove set but not used variable 'priv'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/gpu/drm/sti/sti_crtc.c: In function 'sti_crtc_vblank_cb':
drivers/gpu/drm/sti/sti_crtc.c:255:22: warning:
 variable 'priv' set but not used [-Wunused-but-set-variable]

It never used since introduction in
  commit 9e1f05b28009 ("drm/sti: rename files and functions")

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1541818660-37168-1-git-send-email-yuehaibing@huawei.com

1 files changed, 0 insertions, 2 deletions

diff --git a/drivers/gpu/drm/sti/sti_crtc.c b/drivers/gpu/drm/sti/sti_crtc.c
index 61c2379fba87..ed76e52eb213 100644
--- a/drivers/gpu/drm/sti/sti_crtc.c
+++ b/drivers/gpu/drm/sti/sti_crtc.c
@@ -252,10 +252,8 @@ int sti_crtc_vblank_cb(struct notifier_block *nb,
         struct sti_compositor *compo;
         struct drm_crtc *crtc = data;
         struct sti_mixer *mixer;
-        struct sti_private *priv;
         unsigned int pipe;
 
-        priv = crtc->dev->dev_private;
         pipe = drm_crtc_index(crtc);
         compo = container_of(nb, struct sti_compositor, vtg_vblank_nb[pipe]);
         mixer = compo->mixer[pipe];