sh: Add some missing board headers.

Some of these were dropped in the header directory rework, add
the few missing ones back in.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/include/asm-sh/shmin.h b/include/asm-sh/shmin.h
new file mode 100644
index 0000000..36ba138
--- /dev/null
+++ b/include/asm-sh/shmin.h
@@ -0,0 +1,9 @@
+#ifndef __ASM_SH_SHMIN_H
+#define __ASM_SH_SHMIN_H
+
+#define SHMIN_IO_BASE 0xb0000000UL
+
+#define SHMIN_NE_IRQ IRQ2_IRQ
+#define SHMIN_NE_BASE 0x300
+
+#endif