PCI: Use of_node_name_eq() for node name comparisons

Convert string compares of DT node names to use of_node_name_eq() helper
instead.  This removes direct access to the node name pointer.

Signed-off-by: Rob Herring <robh@kernel.org>
[bhelgaas: drop similar rpaphp_core.c change to avoid merge conflict]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>