[PATCH -next] drm/i915/dsi: remove set but not used variable 'hfront_porch'

[YueHaibing]

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

drivers/gpu/drm/i915/display/icl_dsi.c: In function 
'gen11_dsi_set_transcoder_timings':
drivers/gpu/drm/i915/display/icl_dsi.c:768:6: warning:
 variable 'hfront_porch' set but not used [-Wunused-but-set-variable]

It is never used and can be removed.

Reported-by: Hulk Robot <hul...@huawei.com>
Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
 drivers/gpu/drm/i915/display/icl_dsi.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c 
b/drivers/gpu/drm/i915/display/icl_dsi.c
index 4d952accfaaa..a42348be0438 100644
--- a/drivers/gpu/drm/i915/display/icl_dsi.c
+++ b/drivers/gpu/drm/i915/display/icl_dsi.c
@@ -763,7 +763,7 @@ gen11_dsi_set_transcoder_timings(struct intel_encoder 
*encoder,
        enum transcoder dsi_trans;
        /* horizontal timings */
        u16 htotal, hactive, hsync_start, hsync_end, hsync_size;
-       u16 hfront_porch, hback_porch;
+       u16 hback_porch;
        /* vertical timings */
        u16 vtotal, vactive, vsync_start, vsync_end, vsync_shift;
 
@@ -772,8 +772,6 @@ gen11_dsi_set_transcoder_timings(struct intel_encoder 
*encoder,
        hsync_start = adjusted_mode->crtc_hsync_start;
        hsync_end = adjusted_mode->crtc_hsync_end;
        hsync_size  = hsync_end - hsync_start;
-       hfront_porch = (adjusted_mode->crtc_hsync_start -
-                       adjusted_mode->crtc_hdisplay);
        hback_porch = (adjusted_mode->crtc_htotal -
                       adjusted_mode->crtc_hsync_end);
        vactive = adjusted_mode->crtc_vdisplay;