[PATCH v2 -next] drm/komeda: remove set but not used variable 'old'

[YueHaibing]

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

drivers/gpu/drm/arm/display/komeda/komeda_plane.c:
 In function komeda_plane_atomic_duplicate_state:
drivers/gpu/drm/arm/display/komeda/komeda_plane.c:161:35:
 warning: variable old set but not used [-Wunused-but-set-variable

It is not used since commit 990dee3aa456 ("drm/komeda:
Computing image enhancer internally")

Reported-by: Hulk Robot <hul...@huawei.com>
Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
v2: fix compile err
---
 drivers/gpu/drm/arm/display/komeda/komeda_plane.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_plane.c 
b/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
index c095af1..98e915e 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
@@ -158,7 +158,7 @@ static void komeda_plane_reset(struct drm_plane *plane)
 static struct drm_plane_state *
 komeda_plane_atomic_duplicate_state(struct drm_plane *plane)
 {
-       struct komeda_plane_state *new, *old;
+       struct komeda_plane_state *new;
 
        if (WARN_ON(!plane->state))
                return NULL;
@@ -169,8 +169,6 @@ komeda_plane_atomic_duplicate_state(struct drm_plane *plane)
 
        __drm_atomic_helper_plane_duplicate_state(plane, &new->base);
 
-       old = to_kplane_st(plane->state);
-
        return &new->base;
 }
 
-- 
2.7.4