ssb: trivial: use u8 for chip_rev (it's mask is 0xF)

Signed-off-by: NRafał Miłecki <zajec5@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/ssb/scan.c

@@ -307,7 +307,7 @@ int ssb_bus_scan(struct ssb_bus *bus,
 	} else {
 		if (bus->bustype == SSB_BUSTYPE_PCI) {
 			bus->chip_id = pcidev_to_chipid(bus->host_pci);
-			pci_read_config_word(bus->host_pci, PCI_REVISION_ID,
+			pci_read_config_byte(bus->host_pci, PCI_REVISION_ID,
 					     &bus->chip_rev);
 			bus->chip_package = 0;
 		} else {

include/linux/ssb/ssb.h

@@ -308,7 +308,7 @@ struct ssb_bus {
 
 	/* ID information about the Chip. */
 	u16 chip_id;
-	u16 chip_rev;
+	u8 chip_rev;
 	u16 sprom_offset;
 	u16 sprom_size;		/* number of words in sprom */
 	u8 chip_package;