Remove unused variable 'path'

Signed-off-by: Hannes Reinecke <hare@suse.de>
Parse 'origin' value from iBFT

iBFT has an 'origin' field which indicates the origin of the
network address. If that is set to '3' it indicates that
DHCP has been used; there is no need to evaluate the 'dhcp'
field here.
In fact. latest iPXE sets the 'origin' field, but not the
'dhcp' field.

Signed-off-by: Hannes Reinecke <hare@suse.de>