iwlwifi: remove verify_signature eeprom operation

All drivers share the same implementation, so
there's no need to call this via a function
pointer nor to export it.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-eeprom.c b/drivers/net/wireless/iwlwifi/iwl-eeprom.c
index 88f4a80..bd51b06 100644
--- a/drivers/net/wireless/iwlwifi/iwl-eeprom.c
+++ b/drivers/net/wireless/iwlwifi/iwl-eeprom.c
@@ -214,7 +214,7 @@
  *
 ******************************************************************************/
 
-int iwlcore_eeprom_verify_signature(struct iwl_priv *priv)
+static int iwl_eeprom_verify_signature(struct iwl_priv *priv)
 {
 	u32 gp = iwl_read32(priv, CSR_EEPROM_GP) & CSR_EEPROM_GP_VALID_MSK;
 	int ret = 0;
@@ -246,7 +246,6 @@
 	}
 	return ret;
 }
-EXPORT_SYMBOL(iwlcore_eeprom_verify_signature);
 
 static void iwl_set_otp_access(struct iwl_priv *priv, enum iwl_access_mode mode)
 {
@@ -523,7 +522,7 @@
 
 	priv->cfg->ops->lib->apm_ops.init(priv);
 
-	ret = priv->cfg->ops->lib->eeprom_ops.verify_signature(priv);
+	ret = iwl_eeprom_verify_signature(priv);
 	if (ret < 0) {
 		IWL_ERR(priv, "EEPROM not found, EEPROM_GP=0x%08x\n", gp);
 		ret = -ENOENT;