iwlwifi: remove duplicated define

Duplicated define for listen interval (IWL_CONN_MAX_LISTEN_INTERVAL and
IWL_CONN_LISTEN_INTERVAL), remove IWL_CONN_LISTEN_INTERVAL

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Reported-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-power.c b/drivers/net/wireless/iwlwifi/iwl-power.c
index 432f465..9bce2c1 100644
--- a/drivers/net/wireless/iwlwifi/iwl-power.c
+++ b/drivers/net/wireless/iwlwifi/iwl-power.c
@@ -163,9 +163,9 @@
 		cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
 
 	slp_itrvl = le32_to_cpu(cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1]);
-	if (slp_itrvl > IWL_CONN_LISTEN_INTERVAL)
+	if (slp_itrvl > IWL_CONN_MAX_LISTEN_INTERVAL)
 		cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1] =
-			cpu_to_le32(IWL_CONN_LISTEN_INTERVAL);
+			cpu_to_le32(IWL_CONN_MAX_LISTEN_INTERVAL);
 
 	/* enforce max sleep interval */
 	for (i = IWL_POWER_VEC_SIZE - 1; i >= 0 ; i--) {