frv/PCI: Add struct pci_ops member names to initialization

Some instances of pci_ops initialization rely on the read/write members'
location in the struct.  This is fragile and may break when adding new
members to the beginning of the struct.

No functional change.
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: David Howells <dhowells@redhat.com>

arch/frv/mb93090-mb00/pci-vdk.c

@@ -168,8 +168,8 @@ static int pci_frv_write_config(struct pci_bus *bus, unsigned int devfn, int whe
 }
 
 static struct pci_ops pci_direct_frv = {
-	pci_frv_read_config,
-	pci_frv_write_config,
+	.read = pci_frv_read_config,
+	.write = pci_frv_write_config,
 };
 
 /*