airo: fix test for FLAG_RADIO_DOWN

We should be doing a shift (1 << FLAG_RADIO_DOWN) here before testing
the flag.  As luck would have it, this test works almost correctly.
The current code tests for FLAG_RADIO_OFF instead of FLAG_RADIO_DOWN.

#define FLAG_RADIO_OFF  0       /* User disabling of MAC */
#define FLAG_RADIO_DOWN 1       /* ifup/ifdown disabling of MAC */

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/airo.c

@@ -1869,7 +1869,7 @@ static int readStatsRid(struct airo_info*ai, StatsRid *sr, int rid, int lock)
 
 static void try_auto_wep(struct airo_info *ai)
 {
-	if (auto_wep && !(ai->flags & FLAG_RADIO_DOWN)) {
+	if (auto_wep && !test_bit(FLAG_RADIO_DOWN, &ai->flags)) {
 		ai->expires = RUN_AT(3*HZ);
 		wake_up_interruptible(&ai->thr_wait);
 	}