sh: migrate to arch/sh/include/

This follows the sparc changes a439fe51a1.

Most of the moving about was done with Sam's directions at:

http://marc.info/?l=linux-sh&m=121724823706062&w=2

with subsequent hacking and fixups entirely my fault.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/include/asm/string.h

@@ -0,0 +1,5 @@
+#ifdef CONFIG_SUPERH32
+# include "string_32.h"
+#else
+# include "string_64.h"
+#endif