SSP bus framework

Signed-off-by: Paul Brook <paul@codesourcery.com>
diff --git a/qemu-common.h b/qemu-common.h
index 9d644b6..fdc3679 100644
--- a/qemu-common.h
+++ b/qemu-common.h
@@ -183,6 +183,7 @@
 typedef struct uWireSlave uWireSlave;
 typedef struct I2SCodec I2SCodec;
 typedef struct DeviceState DeviceState;
+typedef struct SSIBus SSIBus;
 
 /* CPU save/load.  */
 void cpu_save(QEMUFile *f, void *opaque);