iwlwifi: remove cck_power_index_compensation

cck_power_index_compensation variable was never used
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>

drivers/net/wireless/iwlwifi/iwl-priv.h

@@ -278,7 +278,6 @@ struct iwl_priv {
 #define IWL_DEFAULT_TX_POWER 0x0F
 	s8 user_txpower_limit;
 	s8 max_channel_txpower_limit;
-	u32 cck_power_index_compensation;
 
 #ifdef CONFIG_PM
 	u32 pm_state[16];

drivers/net/wireless/iwlwifi/iwl4965-base.c

@@ -9088,8 +9088,6 @@ static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	priv->channel_width = IWL_CHANNEL_WIDTH_40MHZ;
 	priv->valid_antenna = 0x7;	/* assume all 3 connected */
 	priv->ps_mode = IWL_MIMO_PS_NONE;
-	priv->cck_power_index_compensation = iwl_read32(
-		priv, CSR_HW_REV_WA_REG);
 
 	iwl4965_set_rxon_chain(priv);