[PATCH -next] drm/imx: fix unused but set variable warnings

[Wang ShaoBo]

Fix unused but set variable warning building with `make W=1`:

drivers/gpu/drm/imx/dcss/dcss-plane.c:270:6: warning:
 variable ‘pixel_format’ set but not used [-Wunused-but-set-variable]
  u32 pixel_format;
      ^~~~~~~~~~~~

Fixes: 9021c317b770 ("drm/imx: Add initial support for DCSS on iMX8MQ")
Reported-by: Hulk Robot <hul...@huawei.com>
Signed-off-by: Wang ShaoBo <bobo.shaobow...@huawei.com>
---
 drivers/gpu/drm/imx/dcss/dcss-plane.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/imx/dcss/dcss-plane.c 
b/drivers/gpu/drm/imx/dcss/dcss-plane.c
index 961d671f171b..e13652e3a115 100644
--- a/drivers/gpu/drm/imx/dcss/dcss-plane.c
+++ b/drivers/gpu/drm/imx/dcss/dcss-plane.c
@@ -267,7 +267,6 @@ static void dcss_plane_atomic_update(struct drm_plane 
*plane,
        struct dcss_plane *dcss_plane = to_dcss_plane(plane);
        struct dcss_dev *dcss = plane->dev->dev_private;
        struct drm_framebuffer *fb = state->fb;
-       u32 pixel_format;
        struct drm_crtc_state *crtc_state;
        bool modifiers_present;
        u32 src_w, src_h, dst_w, dst_h;
@@ -277,7 +276,6 @@ static void dcss_plane_atomic_update(struct drm_plane 
*plane,
        if (!fb || !state->crtc || !state->visible)
                return;
 
-       pixel_format = state->fb->format->format;
        crtc_state = state->crtc->state;
        modifiers_present = !!(fb->flags & DRM_MODE_FB_MODIFIERS);
 
-- 
2.17.1