PCI: rcar: Fix memory leak when no PCIe card is inserted

When no PCIe card is inserted, there is a memory leak as
pci_free_resource_list() is not called before returning.

Signed-off-by: Harunobu Kurokawa <harunobu.kurokawa.dn@renesas.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>