debugfs_pipe_crc: skip on simulation

As with other display tests, they're not working (and in this case,
cause hangs).

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>

tests/debugfs_pipe_crc.c

@@ -220,6 +220,8 @@ int main(int argc, char **argv)
 
 	igt_subtest_init(argc, argv);
 
+	igt_skip_on_simulation();
+
 	igt_fixture {
 		size_t written;
 		int ret;