thunderbolt: Capitalize comment on top of QUIRK_FORCE_POWER_LINK_CONTROLLER

commit 810278da upstream.

To keep it consistent with the other single line comments in the driver.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Liwei Song <liwei.song@windriver.com>