sh: Migrate common board headers to mach-common/.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/boards/mach-titan/io.c b/arch/sh/boards/mach-titan/io.c
index 4730c1d..4badad4 100644
--- a/arch/sh/boards/mach-titan/io.c
+++ b/arch/sh/boards/mach-titan/io.c
@@ -4,7 +4,7 @@
 #include <linux/pci.h>
 #include <asm/machvec.h>
 #include <asm/addrspace.h>
-#include <asm/titan.h>
+#include <mach/titan.h>
 #include <asm/io.h>
 
 static inline unsigned int port2adr(unsigned int port)