iwlwifi: make iwl_hw_detect static to _agn

iwl_hw_detect() only used by _agn, make it static

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index d3de509..8d4a2b5 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -3883,6 +3883,13 @@
 	.flush = iwl_mac_flush,
 };
 
+static void iwl_hw_detect(struct iwl_priv *priv)
+{
+	priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
+	priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
+	pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
+}
+
 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 {
 	int err = 0;