thunderbolt: Introduce tb_switch_is_tiger_lake()

commit 0637e3df upstream.

This is needed to differentiate Tiger Lake from other controllers.

Signed-off-by: Gil Fine <gil.fine@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Liwei Song <liwei.song@windriver.com>