V4L/DVB (4817): Fix uses of "&&" where "&" was intended

Fix uses of "&&" where "&" was intended in bttv-cards.c and tveeprom.c

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>