Fixed two -Wunused-but-set-variable warnings:

/arm/linux/display/aosp-4.14-drm-next/drivers/gpu/drm/arm/display/komeda/komeda_kms.c:
 In function ‘komeda_crtc_normalize_zpos’:
/arm/linux/display/aosp-4.14-drm-next/drivers/gpu/drm/arm/display/komeda/komeda_kms.c:150:26:
 warning: variable ‘fb’ set but not used [-Wunused-but-set-variable]
  struct drm_framebuffer *fb;
                          ^~
/arm/linux/display/aosp-4.14-drm-next/drivers/gpu/drm/arm/display/komeda/komeda_kms.c:
 In function ‘komeda_kms_check’:
/arm/linux/display/aosp-4.14-drm-next/drivers/gpu/drm/arm/display/komeda/komeda_kms.c:209:25:
 warning: variable ‘old_crtc_st’ set but not used [-Wunused-but-set-variable]
  struct drm_crtc_state *old_crtc_st, *new_crtc_st;
                         ^~~~~~~~~~~

Signed-off-by: james qian wang (Arm Technology China) <james.qian.w...@arm.com>
---
 drivers/gpu/drm/arm/display/komeda/komeda_kms.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_kms.c 
b/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
index d50e75f0b2bd..1f0e3f4e8d74 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
@@ -147,7 +147,6 @@ static int komeda_crtc_normalize_zpos(struct drm_crtc *crtc,
        struct komeda_crtc_state *kcrtc_st = to_kcrtc_st(crtc_st);
        struct komeda_plane_state *kplane_st;
        struct drm_plane_state *plane_st;
-       struct drm_framebuffer *fb;
        struct drm_plane *plane;
        struct list_head zorder_list;
        int order = 0, err;
@@ -173,7 +172,6 @@ static int komeda_crtc_normalize_zpos(struct drm_crtc *crtc,
 
        list_for_each_entry(kplane_st, &zorder_list, zlist_node) {
                plane_st = &kplane_st->base;
-               fb = plane_st->fb;
                plane = plane_st->plane;
 
                plane_st->normalized_zpos = order++;
@@ -206,7 +204,7 @@ static int komeda_kms_check(struct drm_device *dev,
                            struct drm_atomic_state *state)
 {
        struct drm_crtc *crtc;
-       struct drm_crtc_state *old_crtc_st, *new_crtc_st;
+       struct drm_crtc_state *new_crtc_st;
        int i, err;
 
        err = drm_atomic_helper_check_modeset(dev, state);
@@ -217,7 +215,7 @@ static int komeda_kms_check(struct drm_device *dev,
         * so need to add all affected_planes (even unchanged) to
         * drm_atomic_state.
         */
-       for_each_oldnew_crtc_in_state(state, crtc, old_crtc_st, new_crtc_st, i) 
{
+       for_each_new_crtc_in_state(state, crtc, new_crtc_st, i) {
                err = drm_atomic_add_affected_planes(state, crtc);
                if (err)
                        return err;
-- 
2.20.1

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