iwlwifi: bug fix in AGG flow - cast const to ULL

This patch fixes a bug in AGG flow:
u64 bitmap = 0;
bitmap |= 1 << 32 results to be 0xffffffff80000000.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-tx.c b/drivers/net/wireless/iwlwifi/iwl-tx.c
index 0182e4d..39f19ebe 100644
--- a/drivers/net/wireless/iwlwifi/iwl-tx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-tx.c
@@ -1391,7 +1391,7 @@
 	/* For each frame attempted in aggregation,
 	 * update driver's record of tx frame's status. */
 	for (i = 0; i < agg->frame_count ; i++) {
-		ack = bitmap & (1 << i);
+		ack = bitmap & (1ULL << i);
 		successes += !!ack;
 		IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
 			ack? "ACK":"NACK", i, (agg->start_idx + i) & 0xff,