pcmcia: re-work pcmcia_request_irq()

Instead of the old pcmcia_request_irq() interface, drivers may now
choose between:

- calling request_irq/free_irq directly. Use the IRQ from *p_dev->irq.

- use pcmcia_request_irq(p_dev, handler_t); the PCMCIA core will
  clean up automatically on calls to pcmcia_disable_device() or
  device ejection.

- drivers still not capable of IRQF_SHARED (or not telling us so) may
  use the deprecated pcmcia_request_exclusive_irq() for the time
  being; they might receive a shared IRQ nonetheless.

CC: linux-bluetooth@vger.kernel.org
CC: netdev@vger.kernel.org
CC: linux-wireless@vger.kernel.org
CC: linux-serial@vger.kernel.org
CC: alsa-devel@alsa-project.org
CC: linux-usb@vger.kernel.org
CC: linux-ide@vger.kernel.org
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

drivers/pcmcia/ds.c

@@ -546,7 +546,6 @@ struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s, unsigned int fu
 			p_dev->function_config = tmp_dev->function_config;
 			p_dev->io = tmp_dev->io;
 			p_dev->irq = tmp_dev->irq;
-			p_dev->irq_v = tmp_dev->irq_v;
 			kref_get(&p_dev->function_config->ref);
 		}
 
@@ -571,7 +570,7 @@ struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s, unsigned int fu
 
 	dev_printk(KERN_NOTICE, &p_dev->dev,
 		   "pcmcia: registering new device %s (IRQ: %d)\n",
-		   p_dev->devname, p_dev->irq_v);
+		   p_dev->devname, p_dev->irq);
 
 	pcmcia_device_query(p_dev);