iwlwifi: remove includes of iwl-helpers.h where not needed

This patch removes includes of iwl-helpers.h where not needed

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Acked-by: Samuel Ortiz <sameo@linux.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-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h
index a520e47..664a983 100644
--- a/drivers/net/wireless/iwlwifi/iwl-dev.h
+++ b/drivers/net/wireless/iwlwifi/iwl-dev.h
@@ -498,6 +498,10 @@
 
 #define IWL_FAT_CHANNEL_52 BIT(IEEE80211_BAND_5GHZ)
 
+#define KELVIN_TO_CELSIUS(x) ((x)-273)
+#define CELSIUS_TO_KELVIN(x) ((x)+273)
+
+
 /**
  * struct iwl_hw_params
  * @max_txq_num: Max # Tx queues supported