sh: sh7785lcr/highlander/hp6xx need linux/irq.h.

More build fixes..

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/boards/mach-hp6xx/setup.c b/arch/sh/boards/mach-hp6xx/setup.c
index 48fece7..746742b 100644
--- a/arch/sh/boards/mach-hp6xx/setup.c
+++ b/arch/sh/boards/mach-hp6xx/setup.c
@@ -12,9 +12,9 @@
 #include <linux/types.h>
 #include <linux/init.h>
 #include <linux/platform_device.h>
+#include <linux/irq.h>
 #include <asm/hd64461.h>
 #include <asm/io.h>
-#include <asm/irq.h>
 #include <mach/hp6xx.h>
 #include <cpu/dac.h>