ath9k: remove replicated null check in ath_pci_aspm_init

Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/pci.c

@@ -115,6 +115,8 @@ static void ath_pci_aspm_init(struct ath_common *common)
 		return;
 
 	parent = pdev->bus->self;
+	if (!parent)
+		return;
 
 	if (ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE) {
 		/* Bluetooth coexistance requires disabling ASPM. */
@@ -126,9 +128,6 @@ static void ath_pci_aspm_init(struct ath_common *common)
 		 * Both upstream and downstream PCIe components should
 		 * have the same ASPM settings.
 		 */
-		if (!parent)
-			return;
-
 		pos = pci_pcie_cap(parent);
 		pci_read_config_byte(parent, pos + PCI_EXP_LNKCTL, &aspm);
 		aspm &= ~(PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1);
@@ -137,9 +136,6 @@ static void ath_pci_aspm_init(struct ath_common *common)
 		return;
 	}
 
-	if (!parent)
-		return;
-
 	pos = pci_pcie_cap(parent);
 	pci_read_config_byte(parent, pos +  PCI_EXP_LNKCTL, &aspm);
 	if (aspm & (PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1)) {