[ARM] Fix Integrator and Versatile interrupt initialisation

Both Integrator and Versatile were using set_irq_handler() and
enable_irq(), and working around the initialisation of the
chained interrupt, instead of the more correct
set_irq_chained_handler() function.  Fix Integrator and
Versatile to use the right function, and remove these work-arounds.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-integrator/integrator_cp.c

@@ -232,8 +232,6 @@ static void __init intcp_init_irq(void)
 	for (i = IRQ_PIC_START; i <= IRQ_PIC_END; i++) {
 		if (i == 11)
 			i = 22;
-		if (i == IRQ_CP_CPPLDINT)
-			i++;
 		if (i == 29)
 			break;
 		set_irq_chip(i, &pic_chip);
@@ -259,8 +257,7 @@ static void __init intcp_init_irq(void)
 		set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
 	}
 
-	set_irq_handler(IRQ_CP_CPPLDINT, sic_handle_irq);
-	pic_unmask_irq(IRQ_CP_CPPLDINT);
+	set_irq_chained_handler(IRQ_CP_CPPLDINT, sic_handle_irq);
 }
 
 /*

arch/arm/mach-versatile/core.c

@@ -112,10 +112,9 @@ void __init versatile_init_irq(void)
 {
 	unsigned int i;
 
-	vic_init(VA_VIC_BASE, IRQ_VIC_START, ~(1 << 31));
+	vic_init(VA_VIC_BASE, IRQ_VIC_START, ~0);
 
-	set_irq_handler(IRQ_VICSOURCE31, sic_handle_irq);
-	enable_irq(IRQ_VICSOURCE31);
+	set_irq_chained_handler(IRQ_VICSOURCE31, sic_handle_irq);
 
 	/* Do second interrupt controller */
 	writel(~0, VA_SIC_BASE + SIC_IRQ_ENABLE_CLEAR);