lldp: fix cleanup

lldp/init.sls

 {%- set lldp = False -%}
 {%- for name, interface in pillar.ifaces.items() if 'lldp' in interface -%}
-  {%- do lldp = True -%}
+  {%- set lldp = True -%}
 {%- endfor -%}
 {%- if lldp -%}
 lldpd: