ath9k_hw: Fix possible OOB array indexing in gen_timer_index[] on 64-bit

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index 6d3e314..abaa2f0 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -432,7 +432,7 @@
  * Using de Bruijin sequence to to look up 1's index in a 32 bit number
  * debruijn32 = 0000 0111 0111 1100 1011 0101 0011 0001
  */
-#define debruijn32 0x077CB531UL
+#define debruijn32 0x077CB531U
 
 struct ath_gen_timer_configuration {
 	u32 next_addr;