[PARPORT] Consolidate code copies into a single generic irq handler

Several arches used the exact same code for their parport irq handling.
Make that code generic, in parport_irq_handler().

Also, s/__inline__/inline/ in include/linux/parport.h.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/parport/parport_atari.c b/drivers/parport/parport_atari.c
index 6ea9929..ad4cdd2 100644
--- a/drivers/parport/parport_atari.c
+++ b/drivers/parport/parport_atari.c
@@ -103,13 +103,6 @@
 {
 }
 
-static irqreturn_t
-parport_atari_interrupt(int irq, void *dev_id)
-{
-	parport_generic_irq(irq, (struct parport *) dev_id);
-	return IRQ_HANDLED;
-}
-
 static void
 parport_atari_enable_irq(struct parport *p)
 {
@@ -208,7 +201,7 @@
 					  &parport_atari_ops);
 		if (!p)
 			return -ENODEV;
-		if (request_irq(IRQ_MFP_BUSY, parport_atari_interrupt,
+		if (request_irq(IRQ_MFP_BUSY, parport_irq_handler,
 				IRQ_TYPE_SLOW, p->name, p)) {
 			parport_put_port (p);
 			return -ENODEV;