V4L/DVB: cx23885: strcpy() => strlcpy()

cap->driver is a 16 char buffer and dev->name is a 32 char buffer.
I don't see an actual problem, but we may as well make the static
checkers happy.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>