cocinelle: iterators: semantic patch to delete unneeded of_node_put

Device node iterators perform an of_node_put on each iteration, so putting
an of_node_put before a continue results in a double put.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Michal Marek <mmarek@suse.cz>