rt2x00: Fix chipset detection for rt73usb

[Ivo van Doorn <ivdoorn@gmail.com>]

The lower 4 bytes of the chipset revision must contain
a non-zero value. This bug was introduced by

	commit: fbebe7c588a341d7a39ce0b0ea5bd5c58f906b07
	rt2x00: Simplify rt2x00_check_rev

	rt2x00_check_rev() was too specific for rt2500usb and rt73usb,
	by adding the mask argument (instead of hardcoding it into
	the function itself) we can use the function in rt2800usb as
	well.

	v2: Fix revision mask for rt2800usb

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
---
 drivers/net/wireless/rt2x00/rt73usb.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/net/wireless/rt2x00/rt73usb.c b/drivers/net/wireless/rt2x00/rt73usb.c
index 4f94a61..dc2ad94 100644
--- a/drivers/net/wireless/rt2x00/rt73usb.c
+++ b/drivers/net/wireless/rt2x00/rt73usb.c
@@ -1847,7 +1847,7 @@ static int rt73usb_init_eeprom(struct rt2x00_dev *rt2x00dev)
 	rt2x00_set_chip(rt2x00dev, RT2571, value, reg);
 
 	if (!rt2x00_check_rev(&rt2x00dev->chip, 0x000ffff0, 0x25730) ||
-	    !rt2x00_check_rev(&rt2x00dev->chip, 0x0000000f, 0)) {
+	    rt2x00_check_rev(&rt2x00dev->chip, 0x0000000f, 0)) {
 		ERROR(rt2x00dev, "Invalid RT chipset detected.\n");
 		return -ENODEV;
 	}
-- 
1.6.2.3