[media] tm6000: add/rework reg.defines

Rework registers defines. Add TM6000 specific registers defines.
Add marks and comments for TM6010 specific registers.

Signed-off-by: Beholder Intl. Ltd. Dmitry Belimov <d.belimov@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>