i2c: Add IDs to adapters

IDs have been defined but not used by most of the I2C adapters.
By having a unique ID, clients can check for correct connection
during probe.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index de5e23a..8c3569a 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -442,6 +442,7 @@
 
 static struct i2c_adapter i801_adapter = {
 	.owner		= THIS_MODULE,
+	.id		= I2C_HW_SMBUS_I801,
 	.class		= I2C_CLASS_HWMON,
 	.algo		= &smbus_algorithm,
 };