thunderbolt: Macro rename

This first patch updates the NHI Thunderbolt controller registers file to
reflect that it is not only for Cactus Ridge.
No functional change intended.

Signed-off-by: Amir Levy <amir.jer.levy@intel.com>
Signed-off-by: Andreas Noever <andreas.noever@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>