rt2x00: Style fix for interval defines

Extra parenthesis are not needed in these 2 cases,
all other defines in rt2x00 are done without parenthesis
so just fixup these 2 cases.
Signed-off-by: NAlban Browaeys <prahal@yahoo.com>
Signed-off-by: NIvo van Doorn <IvDoorn@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2x00lib.h

@@ -32,8 +32,8 @@
  * Interval defines
  * Both the link tuner as the rfkill will be called once per second.
  */
-#define LINK_TUNE_INTERVAL	( round_jiffies_relative(HZ) )
-#define RFKILL_POLL_INTERVAL	( 1000 )
+#define LINK_TUNE_INTERVAL	round_jiffies_relative(HZ)
+#define RFKILL_POLL_INTERVAL	1000
 
 /*
  * rt2x00_rate: Per rate device information