packages: move zaptel to telephony feed

zaptel and zaptel-1.4.x belong to telephony, so move them to the
proper feed.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/packages@39842 3c298f89-4303-0410-b956-a3cf2f4a3e73