ath10k: fix MSI-X setup failpath

Irqs were not freed up correctly upon msi-x setup
failure.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath10k/pci.c

@@ -1883,9 +1883,10 @@ static int ath10k_pci_start_intr_msix(struct ath10k *ar, int num)
 			ath10k_warn("request_irq(%d) failed %d\n",
 				    ar_pci->pdev->irq + i, ret);
 
-			for (; i >= MSI_ASSIGN_CE_INITIAL; i--)
-				free_irq(ar_pci->pdev->irq, ar);
+			for (i--; i >= MSI_ASSIGN_CE_INITIAL; i--)
+				free_irq(ar_pci->pdev->irq + i, ar);
 
+			free_irq(ar_pci->pdev->irq + MSI_ASSIGN_FW, ar);
 			pci_disable_msi(ar_pci->pdev);
 			return ret;
 		}