ssb: use pci_dev->subsystem_{vendor,device}

The SSB code reads PCI subsystem IDs from the PCI configuration registers while
they are already stored by the PCI subsystem in the 'subsystem_{vendor|device}'
fields of 'struct pci_dev'...
Signed-off-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/ssb/pci.c

@@ -734,10 +734,8 @@ static int ssb_pci_sprom_get(struct ssb_bus *bus,
 static void ssb_pci_get_boardinfo(struct ssb_bus *bus,
 				  struct ssb_boardinfo *bi)
 {
-	pci_read_config_word(bus->host_pci, PCI_SUBSYSTEM_VENDOR_ID,
-			     &bi->vendor);
-	pci_read_config_word(bus->host_pci, PCI_SUBSYSTEM_ID,
-			     &bi->type);
+	bi->vendor = bus->host_pci->subsystem_vendor;
+	bi->type = bus->host_pci->subsystem_device;
 	bi->rev = bus->host_pci->revision;
 }