sh: Updates for IRQ handler changes.

Trivial fixes for build breakage introduced by IRQ handler changes.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/include/asm-sh/irq_regs.h b/include/asm-sh/irq_regs.h
new file mode 100644
index 0000000..3dd9c0b
--- /dev/null
+++ b/include/asm-sh/irq_regs.h
@@ -0,0 +1 @@
+#include <asm-generic/irq_regs.h>