drm/etnaviv: clear alloced event

Results in less code as the users do not set every struct member to 0/NULL.

Signed-off-by: Christian Gmeiner <[e-mail]>
Reviewed-by: Lucas Stach <[e-mail]>
Signed-off-by: Lucas Stach <[e-mail]>

drivers/gpu/drm/etnaviv/etnaviv_gpu.c

···
 		int event = find_first_zero_bit(gpu->event_bitmap, ETNA_NR_EVENTS);
 
 		events[i] = event;
+		memset(&gpu->event[event], 0, sizeof(struct etnaviv_event));
 		set_bit(event, gpu->event_bitmap);
 	}
 
···
 	}
 
 	gpu->event[event].fence = fence;
-	gpu->event[event].sync_point = NULL;
 	submit->fence = dma_fence_get(fence);
 	gpu->active_fence = submit->fence->seqno;