iris: Enable fast clear colors on gen11.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

src/gallium/drivers/iris/iris_clear.c

@@ -78,9 +78,6 @@ can_fast_clear_color(struct iris_context *ice,
    struct iris_batch *batch = &ice->batches[IRIS_BATCH_RENDER];
    const struct gen_device_info *devinfo = &batch->screen->devinfo;
 
-   if (devinfo->gen > 9)
-      return false;
-
    if (res->aux.usage == ISL_AUX_USAGE_NONE)
       return false;