drm/v3d: Don't increment `enabled_ns` twice

The commit 509433d8 ("drm/v3d: Expose the total GPU usage stats on sysfs")
introduced the calculation of global GPU stats. For the regards, it used
the already existing infrastructure provided by commit 09a93cc4 ("drm/v3d:
Implement show_fdinfo() callback for GPU usage stats"). While adding
global GPU stats calculation ability, the author forgot to delete the
existing one.

Currently, the value of `enabled_ns` is incremented twice by the end of
the job, when it should be added just once. Therefore, delete the
leftovers from commit 509433d8 ("drm/v3d: Expose the total GPU usage
stats on sysfs").

Fixes: 509433d8 ("drm/v3d: Expose the total GPU usage stats on sysfs")
Reported-by: Tvrtko Ursulin <tursulin@igalia.com>
Signed-off-by: Maíra Canal <mcanal@igalia.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
Reviewed-by: Jose Maria Casanova Crespo <jmcasanova@igalia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240403203517.731876-2-mcanal@igalia.com

drivers/gpu/drm/v3d/v3d_irq.c

@@ -105,7 +105,6 @@ v3d_irq(int irq, void *arg)
 		struct v3d_file_priv *file = v3d->bin_job->base.file->driver_priv;
 		u64 runtime = local_clock() - file->start_ns[V3D_BIN];
 
-		file->enabled_ns[V3D_BIN] += local_clock() - file->start_ns[V3D_BIN];
 		file->jobs_sent[V3D_BIN]++;
 		v3d->queue[V3D_BIN].jobs_sent++;
 
@@ -126,7 +125,6 @@ v3d_irq(int irq, void *arg)
 		struct v3d_file_priv *file = v3d->render_job->base.file->driver_priv;
 		u64 runtime = local_clock() - file->start_ns[V3D_RENDER];
 
-		file->enabled_ns[V3D_RENDER] += local_clock() - file->start_ns[V3D_RENDER];
 		file->jobs_sent[V3D_RENDER]++;
 		v3d->queue[V3D_RENDER].jobs_sent++;
 
@@ -147,7 +145,6 @@ v3d_irq(int irq, void *arg)
 		struct v3d_file_priv *file = v3d->csd_job->base.file->driver_priv;
 		u64 runtime = local_clock() - file->start_ns[V3D_CSD];
 
-		file->enabled_ns[V3D_CSD] += local_clock() - file->start_ns[V3D_CSD];
 		file->jobs_sent[V3D_CSD]++;
 		v3d->queue[V3D_CSD].jobs_sent++;
 
@@ -195,7 +192,6 @@ v3d_hub_irq(int irq, void *arg)
 		struct v3d_file_priv *file = v3d->tfu_job->base.file->driver_priv;
 		u64 runtime = local_clock() - file->start_ns[V3D_TFU];
 
-		file->enabled_ns[V3D_TFU] += local_clock() - file->start_ns[V3D_TFU];
 		file->jobs_sent[V3D_TFU]++;
 		v3d->queue[V3D_TFU].jobs_sent++;