lldpad: remove obsolete recipe

Based on this thread:

        http://comments.gmane.org/gmane.comp.handhelds.openembedded/70890



it seems that lldpd is a more complete implementation of the LLDP
protocol.  Remove this implementation to provide better direction to
newcomers and to attempt to focus support for a single implementation in
the meta-networking layer.

Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com>