Make SH port work for packagers that don't differentiate between SH4 and SH4A

Generic bits done by me, SH specific bits implemented by
Nobuhiro Iwamatsu <iwamatsu@nigauri.org>.

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
diff --git a/arch/arch.h b/arch/arch.h
index 8cafa11..16f4c3a 100644
--- a/arch/arch.h
+++ b/arch/arch.h
@@ -58,4 +58,18 @@
 #include "../lib/ffz.h"
 #endif
 
+#ifndef ARCH_HAVE_INIT
+static inline int arch_init(char *envp[])
+{
+	return 0;
+}
+#endif
+
+enum {
+	ARCH_FLAG_1	= 1 << 0,
+	ARCH_FLAG_2	= 1 << 1,
+	ARCH_FLAG_3	= 1 << 2,
+	ARCH_FLAG_4	= 1 << 3,
+};
+
 #endif