intel/aub: Return early if we disable aub dumps

No need to prepare the .aub header and dump in that case, it'll be
done with the next call with true.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

intel/intel_bufmgr_gem.c

@@ -2885,6 +2885,7 @@ drm_intel_bufmgr_gem_set_aub_dump(drm_intel_bufmgr *bufmgr, int enable)
 			fclose(bufmgr_gem->aub_file);
 			bufmgr_gem->aub_file = NULL;
 		}
+		return;
 	}
 
 	if (geteuid() != getuid())