i2c: Deprecate client_register and client_unregister methods

The new i2c binding model makes the client_register and
client_unregister methods of struct i2c_adapter useless, so we can
remove them with the rest of the legacy model.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index c86c3b0..00ee11e 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -353,8 +353,8 @@
 	void *algo_data;
 
 	/* --- administration stuff. */
-	int (*client_register)(struct i2c_client *);
-	int (*client_unregister)(struct i2c_client *);
+	int (*client_register)(struct i2c_client *) __deprecated;
+	int (*client_unregister)(struct i2c_client *) __deprecated;
 
 	/* data fields that are valid for all devices	*/
 	u8 level; 			/* nesting level for lockdep */