ath5k: do not release irq across suspend/resume

Paraphrasing Rafael J. Wysocki: "drivers should not release PCI IRQs
in suspend."  Doing so causes a warning during suspend/resume on some
platforms.

Cc: Rafael J. Wysocki <rjw@sisk.pl>
Reported-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath5k/base.c

@@ -674,7 +674,6 @@ ath5k_pci_suspend(struct pci_dev *pdev, pm_message_t state)
 
 	ath5k_led_off(sc);
 
-	free_irq(pdev->irq, sc);
 	pci_save_state(pdev);
 	pci_disable_device(pdev);
 	pci_set_power_state(pdev, PCI_D3hot);
@@ -702,18 +701,8 @@ ath5k_pci_resume(struct pci_dev *pdev)
 	 */
 	pci_write_config_byte(pdev, 0x41, 0);
 
-	err = request_irq(pdev->irq, ath5k_intr, IRQF_SHARED, "ath", sc);
-	if (err) {
-		ATH5K_ERR(sc, "request_irq failed\n");
-		goto err_no_irq;
-	}
-
 	ath5k_led_enable(sc);
 	return 0;
-
-err_no_irq:
-	pci_disable_device(pdev);
-	return err;
 }
 #endif /* CONFIG_PM */