i2c-eg20t: use i2c_add_numbered_adapter to get a fixed bus number

For EG20T and ML7213 IOH, the i2c controller numbers are fixed, using
fixed bus number will make it much easier for platform code to use
i2c_register_board_info() to register i2c devices.
Signed-off-by: NFeng Tang <feng.tang@intel.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

drivers/i2c/busses/i2c-eg20t.c

@@ -918,7 +918,9 @@ static int __devinit pch_i2c_probe(struct pci_dev *pdev,
 		pch_adap->dev.parent = &pdev->dev;
 
 		pch_i2c_init(&adap_info->pch_data[i]);
-		ret = i2c_add_adapter(pch_adap);
+
+		pch_adap->nr = i;
+		ret = i2c_add_numbered_adapter(pch_adap);
 		if (ret) {
 			pch_pci_err(pdev, "i2c_add_adapter[ch:%d] FAILED\n", i);
 			goto err_add_adapter;