ARM: pxa: encode IRQ number into .nr_irqs

Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Acked-by: Antonio Ospite <ospite@studenti.unina.it>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
diff --git a/arch/arm/mach-pxa/include/mach/littleton.h b/arch/arm/mach-pxa/include/mach/littleton.h
index 6c9b21c..2a5726c 100644
--- a/arch/arm/mach-pxa/include/mach/littleton.h
+++ b/arch/arm/mach-pxa/include/mach/littleton.h
@@ -10,4 +10,6 @@
 #define EXT0_GPIO_BASE	(NR_BUILTIN_GPIO)
 #define EXT0_GPIO(x)	(EXT0_GPIO_BASE + (x))
 
+#define LITTLETON_NR_IRQS	(IRQ_BOARD_START + 8)
+
 #endif /* __ASM_ARCH_LITTLETON_H */