strncpy() doesn't warrant a NUL terminated string. Use
strlcpy() instead.

Fixes Coverity bug CID#1195195.
Acked-by: NEzequiel Garcia <ezequiel.garcia@free-electrons.com>
Acked-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>