[ARM] If linux/irq.h is included, asm/irq.h is not required

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-ixp4xx/gateway7001-pci.c

@@ -24,7 +24,6 @@
 
 #include <asm/mach-types.h>
 #include <asm/hardware.h>
-#include <asm/irq.h>
 
 #include <asm/mach/pci.h>
 

arch/arm/mach-ixp4xx/gtwx5715-pci.c

@@ -29,7 +29,6 @@
 
 #include <asm/mach-types.h>
 #include <asm/hardware.h>
-#include <asm/irq.h>
 #include <asm/arch/gtwx5715.h>
 #include <asm/mach/pci.h>
 

arch/arm/mach-ixp4xx/wg302v2-pci.c

@@ -24,7 +24,6 @@
 
 #include <asm/mach-types.h>
 #include <asm/hardware.h>
-#include <asm/irq.h>
 
 #include <asm/mach/pci.h>