Add back missing i2c_get_client() call.

#
# Patch managed by http://www.mn-logistik.de/unsupported/pxa250/patcher
#

--- linux-ra_alpha-update/drivers/i2c/i2c-core.c~i2c-get-client
+++ linux-ra_alpha-update/drivers/i2c/i2c-core.c
@@ -412,6 +412,57 @@
 	return res;
 }
 
+struct i2c_client *i2c_get_client(int driver_id, int adapter_id, 
+					struct i2c_client *prev)
+{
+	struct list_head *adap_list;
+	struct list_head *item, *_n;
+	struct i2c_adapter *adap;
+	struct i2c_client *client;
+	int found;
+
+	down(&core_lists);
+
+	adap_list = &adapters;
+	if ( prev ) {
+		/* we start searching at the previous clients adapter */
+		adap_list = &prev->adapter->list;
+	}
+
+	found = 0;
+	client = NULL;
+	list_for_each_entry(adap, adap_list, list) {
+		dev_dbg(&adap->dev, "examining adapter id=%08x\n", adap->id);
+		
+		if ( adapter_id && adap->id != adapter_id )
+			continue; /* not the adapter id we want */
+		
+		list_for_each_safe(item, _n, &adap->clients) {
+			client = list_entry(item, struct i2c_client, list);
+			dev_dbg(&client->dev, "examining client\n");
+			dev_dbg(&client->dev, "driver id=%08x\n", client->driver->id);
+
+			if ( prev && prev == client ) {
+				prev = NULL;
+				continue;
+			}
+			
+			if (client->driver->id != driver_id)
+				continue; /* not the driver id we want */
+
+			if ( client->flags & I2C_CLIENT_ALLOW_USE ) {
+				dev_dbg(&client->dev, "found client\n");
+				found = 1;
+				goto out_unlock;
+			}
+		}
+	}
+
+out_unlock:
+	up(&core_lists);
+	return found?client:NULL;
+}
+
 static int i2c_inc_use_client(struct i2c_client *client)
 {
 
@@ -1261,6 +1312,7 @@
 EXPORT_SYMBOL(i2c_del_driver);
 EXPORT_SYMBOL(i2c_attach_client);
 EXPORT_SYMBOL(i2c_detach_client);
+EXPORT_SYMBOL(i2c_get_client);
 EXPORT_SYMBOL(i2c_use_client);
 EXPORT_SYMBOL(i2c_release_client);
 EXPORT_SYMBOL(i2c_clients_command);