sh: First support code of SuperH.

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/include/asm-sh/cpu_sh4.h b/include/asm-sh/cpu_sh4.h
new file mode 100644
index 0000000..e0275f3
--- /dev/null
+++ b/include/asm-sh/cpu_sh4.h
@@ -0,0 +1,10 @@
+#ifndef _ASM_CPU_SH4_H_
+#define _ASM_CPU_SH4_H_
+#if defined (CONFIG_CPU_SH7750)
+#include <asm/cpu_sh7750.h>
+#elif defined (CONFIG_CPU_SH7780)
+#include <asm/cpu_sh7780.h>
+#else
+#error "Unknown SH4 variant"
+#endif
+#endif