V4L/DVB (3340): Add bttv card MagicTV (rebranded MachTV)


- Add bttv card MagicTV (rebranded MachTV)
Signed-off-by: NJulian Calaby <julian.calaby@gmail.com>
Signed-off-by: NMichael Krufky <mkrufky@m1k.net>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>