thunderbolt: Pass CL state bitmask to tb_port_clx_supported()

Instead of testing just a single CL state we can pass a bitmask of
states to check. This makes it simpler for callers of the function.

We also add a check for CL2 even though not fully supported by the
driver yet.

Suggested-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>