ARM: 7342/2: sa1100: prepare for sparse irq conversion

In preparation to convert SA1100 to sparse irq, set .nr_irqs for each machine
and explicitly include mach/irqs.h as needed.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-sa1100/badge4.c b/arch/arm/mach-sa1100/badge4.c
index 5839c9d8..8c80542 100644
--- a/arch/arm/mach-sa1100/badge4.c
+++ b/arch/arm/mach-sa1100/badge4.c
@@ -304,6 +304,7 @@
 MACHINE_START(BADGE4, "Hewlett-Packard Laboratories BadgePAD 4")
 	.atag_offset	= 0x100,
 	.map_io		= badge4_map_io,
+	.nr_irqs	= SA1100_NR_IRQS,
 	.init_irq	= sa1100_init_irq,
 	.timer		= &sa1100_timer,
 #ifdef CONFIG_SA1111