ath5k: Check if pci pdev struct is initialized in common functions.

To be able to support other busses than PCI check if pci device
structure is initialized.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Wojciech Dubowik <Wojciech.Dubowik@neratec.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath5k/attach.c b/drivers/net/wireless/ath/ath5k/attach.c
index a84782a..86f6fec 100644
--- a/drivers/net/wireless/ath/ath5k/attach.c
+++ b/drivers/net/wireless/ath/ath5k/attach.c
@@ -273,7 +273,7 @@
 	/*
 	 * Write PCI-E power save settings
 	 */
-	if ((ah->ah_version == AR5K_AR5212) && (pdev->is_pcie)) {
+	if ((ah->ah_version == AR5K_AR5212) && pdev && (pdev->is_pcie)) {
 		ath5k_hw_reg_write(ah, 0x9248fc00, AR5K_PCIE_SERDES);
 		ath5k_hw_reg_write(ah, 0x24924924, AR5K_PCIE_SERDES);
 
@@ -305,8 +305,7 @@
 	/* Get misc capabilities */
 	ret = ath5k_hw_set_capabilities(ah);
 	if (ret) {
-		ATH5K_ERR(sc, "unable to get device capabilities: 0x%04x\n",
-			sc->pdev->device);
+		ATH5K_ERR(sc, "unable to get device capabilities\n");
 		goto err;
 	}