package/libv4l: fix udev configure options

AC_ARG_WITH([libudev] was removed in version 1.12.0:
https://git.linuxtv.org/v4l-utils.git/commit/configure.ac?id=3aba7817cd1994e6da00651114368db8171eabcc



Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>