V4L/DVB: tm6000: fix compilation due to the lack of a semicolon

Add a missing semicolon to fix this error:

In file included from drivers/staging/tm6000/tm6000-cards.c:32:
drivers/staging/tm6000/tm6000.h:123: error: two or more data types in
declaration specifiers

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>