thunderbolt: Increase sideband access polling delay

The USB4 sideband access is slow compared to the high-speed link and the
access timing parameters are tens of milliseconds according the spec. To
avoid too much unnecessary polling for the sideband pass the wait delay
to usb4_port_wait_for_bit() and use larger (5ms) value compared to the
high-speed access.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>