sh: Prevent leaking of CONFIG_SUPERH32 to userspace in asm/unistd.h.

CONFIG_SUPERH32 is currently trickling into userspace unistd.h. Attached
patch uses __SH5__ define in userspace.
Signed-off-by: NKhem Raj <raj.khem@gmail.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

include/asm-sh/unistd.h

-#ifdef CONFIG_SUPERH32
-# include "unistd_32.h"
+#ifdef __KERNEL__
+# ifdef CONFIG_SUPERH32
+#  include "unistd_32.h"
+# else
+#  include "unistd_64.h"
+# endif
 #else
-# include "unistd_64.h"
+# ifdef __SH5__
+#  include "unistd_64.h"
+# else
+#  include "unistd_32.h"
+# endif
 #endif