[ARM] Wrap calls to descriptor handlers

This is part of Thomas Gleixner's generic IRQ patch, which converts
ARM to use the generic IRQ subsystem.  Here, we wrap calls to
desc->handler() in an inline function, desc_handle_irq().  This
reduces the size of Thomas' patch since the changes become more
localised.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/kernel/ecard.c b/arch/arm/kernel/ecard.c
index 6540db6..dceb826 100644
--- a/arch/arm/kernel/ecard.c
+++ b/arch/arm/kernel/ecard.c
@@ -585,7 +585,7 @@
 
 		if (pending) {
 			struct irqdesc *d = irq_desc + ec->irq;
-			d->handle(ec->irq, d, regs);
+			desc_handle_irq(ec->irq, d, regs);
 			called ++;
 		}
 	}
@@ -632,7 +632,7 @@
 			 * Serial cards should go in 0/1, ethernet/scsi in 2/3
 			 * otherwise you will lose serial data at high speeds!
 			 */
-			d->handle(ec->irq, d, regs);
+			desc_handle_irq(ec->irq, d, regs);
 		} else {
 			printk(KERN_WARNING "card%d: interrupt from unclaimed "
 			       "card???\n", slot);