main: Use dn_name for printing virtual nodes
main: Use dn_name for printing virtual nodes

Virtual nodes do not have a class name.  When traversing system device
tree view, virtual nodes need to be handled correctly.  So instead of
skipping the nodes if classname is not set, print dn name for virtual
nodes.

Signed-off-by: Amitay Isaacs <a505e7c038746dbeb3edcd8d146dbd515432801f@ozlabs.org>
Reviewed-by: Alistair Popple <e9adbcf81c8a36ccc628e09bc92d0e25e1c8e501@popple.id.au>

open-power/pdbg,open-power/pdbg,open-power/pdbg