busybox

udhcpc: Unconditionally call deconfig script, not only if lease is active

The udhcpc script may be used to setup fallback configuration (E.G. IPv4LL,
fixed IP address, ..) that also needs to be cleaned up on release (E.G.
when SIGUSR2 is called or on shutdown with -R), so unconditionally call
deconfig.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>