V4L/DVB (3108): tveeprom cleanup of hardcoded tuner format values.

- Cleaned up the structure to use the V4L2_STD_xxx definitions
rather than a one off set of hardcoded values - which could
change in the future.

Signed-off-by: Steven Toth <stoth@hauppauge.com>
Signed-off-by: Michael Krufky <mkrufky@m1k.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>