sh: microdev: Fix compile warnings.

irq.c needs linux/interrupt.h.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/boards/superh/microdev/irq.c

@@ -11,6 +11,7 @@
 
 #include <linux/init.h>
 #include <linux/irq.h>
+#include <linux/interrupt.h>
 #include <asm/system.h>
 #include <asm/io.h>
 #include <asm/microdev.h>