protocol: Add reset

Change-Id: Ie5c11e71312c30de1aa9ec14d963bde91545dc50
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/protocol.h b/protocol.h
index c147139..d7827c0 100644
--- a/protocol.h
+++ b/protocol.h
@@ -30,6 +30,7 @@
 };
 
 struct protocol_ops {
+	int (*reset)(struct mbox_context *context);
 	int (*get_info)(struct mbox_context *context,
 			struct protocol_get_info *io);
 };
@@ -40,6 +41,7 @@
 int protocol_negotiate_version(struct mbox_context *context, uint8_t requested);
 
 /* Protocol v1 */
+int protocol_v1_reset(struct mbox_context *context);
 int protocol_v1_get_info(struct mbox_context *context,
 			 struct protocol_get_info *io);