omap iommu: update ducati mmu irq define name

2.6.34-rc6 kernel has the Ducati mmu irq define name changed, which is
resulting in compilation error.
Signed-off-by: Hari Kanigeri <h-kanigeri2@ti.com>
Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>

arch/arm/mach-omap2/omap-iommu.c

@@ -59,7 +59,7 @@ static struct platform_device *omap3_iommu_pdev[NR_OMAP3_IOMMU_DEVICES];
 static struct iommu_device omap4_devices[] = {
 	{
 		.base = OMAP4_MMU1_BASE,
-		.irq = INT_44XX_DUCATI_MMU_IRQ,
+		.irq = OMAP44XX_IRQ_DUCATI_MMU,
 		.pdata = {
 			.name = "ducati",
 			.nr_tlb_entries = 32,