sh: Provide the asm/syscall.h interface, needed by tracehook.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/include/asm/syscall_64.h b/arch/sh/include/asm/syscall_64.h
new file mode 100644
index 0000000..bcaaa8c
--- /dev/null
+++ b/arch/sh/include/asm/syscall_64.h
@@ -0,0 +1,6 @@
+#ifndef __ASM_SH_SYSCALL_64_H
+#define __ASM_SH_SYSCALL_64_H
+
+#include <asm-generic/syscall.h>
+
+#endif /* __ASM_SH_SYSCALL_64_H */