PCI: Fix devm_pci_alloc_host_bridge() memory leak

Fix a memory leak by freeing the PCI resource list in
devm_pci_release_host_bridge_dev().

Fixes: 5c3f18cc ("PCI: Add devm_pci_alloc_host_bridge() interface")
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>