iwl3945 : Fix Sparse Warnings

Patch fixes sparse warnings. No need to convert u8 variable
to 32.
Signed-off-by: Abhijeet Kolekar <abhijeet.kolekar@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl3945-base.c

@@ -4741,7 +4741,7 @@ static void iwl3945_free_channel_map(struct iwl3945_priv *priv)
 #define IWL_PASSIVE_DWELL_BASE      (100)
 #define IWL_CHANNEL_TUNE_TIME       5
 
-#define IWL_SCAN_PROBE_MASK(n)	 cpu_to_le32((BIT(n) | (BIT(n) - BIT(1))))
+#define IWL_SCAN_PROBE_MASK(n)	 (BIT(n) | (BIT(n) - BIT(1)))
 
 static inline u16 iwl3945_get_active_dwell_time(struct iwl3945_priv *priv,
 						enum ieee80211_band band,