[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/mach-s3c2410/s3c2440-irq.c b/arch/arm/mach-s3c2410/s3c2440-irq.c
index 7cb9912..278d004 100644
--- a/arch/arm/mach-s3c2410/s3c2440-irq.c
+++ b/arch/arm/mach-s3c2410/s3c2440-irq.c
@@ -64,11 +64,11 @@
 	if (subsrc != 0) {
 		if (subsrc & 1) {
 			mydesc = irq_desc + IRQ_S3C2440_WDT;
-			mydesc->handle( IRQ_S3C2440_WDT, mydesc, regs);
+			desc_handle_irq(IRQ_S3C2440_WDT, mydesc, regs);
 		}
 		if (subsrc & 2) {
 			mydesc = irq_desc + IRQ_S3C2440_AC97;
-			mydesc->handle(IRQ_S3C2440_AC97, mydesc, regs);
+			desc_handle_irq(IRQ_S3C2440_AC97, mydesc, regs);
 		}
 	}
 }
@@ -122,11 +122,11 @@
 	if (subsrc != 0) {
 		if (subsrc & 1) {
 			mydesc = irq_desc + IRQ_S3C2440_CAM_C;
-			mydesc->handle( IRQ_S3C2440_WDT, mydesc, regs);
+			desc_handle_irq(IRQ_S3C2440_CAM_C, mydesc, regs);
 		}
 		if (subsrc & 2) {
 			mydesc = irq_desc + IRQ_S3C2440_CAM_P;
-			mydesc->handle(IRQ_S3C2440_AC97, mydesc, regs);
+			desc_handle_irq(IRQ_S3C2440_CAM_P, mydesc, regs);
 		}
 	}
 }