[media] cec-funcs.h: fix typo: && should be &

Fix typo where logical AND was used instead of bitwise AND.

Reported-by: David Binderman <linuxdev.baldrick@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>