ARM: it8152: explicitly include mach/irqs.h

In preparation to make mach/irqs.h optional, directly include mach/irq.h
to get IRQ_BOARD_START.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>

arch/arm/include/asm/hardware/it8152.h

@@ -9,6 +9,9 @@
 
 #ifndef __ASM_HARDWARE_IT8152_H
 #define __ASM_HARDWARE_IT8152_H
+
+#include <mach/irqs.h>
+
 extern void __iomem *it8152_base_address;
 
 #define IT8152_IO_BASE			(it8152_base_address + 0x03e00000)