rt2x00: rt2x00_rev() should return u32

The "rev" field in chipset definition is an u32,
which means that rt2x00_rev() which returns that field
should be of the same type.
Signed-off-by: NIvo van Doorn <IvDoorn@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2x00.h

@@ -868,7 +868,7 @@ static inline char rt2x00_rf(const struct rt2x00_chip *chipset, const u16 chip)
 	return (chipset->rf == chip);
 }
 
-static inline u16 rt2x00_rev(const struct rt2x00_chip *chipset)
+static inline u32 rt2x00_rev(const struct rt2x00_chip *chipset)
 {
 	return chipset->rev;
 }