[media] go7007: using strlcpy instead of strncpy

For NUL terminated string, need always set '\0' in the end.

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>