[PATCH -mm] i2c: style cleanups after idr_alloc() conversion

[Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>]

Style cleanups suggested by Wolfram.

* s/res/id/ in i2c_add_numbered_adapter() so that it matches
  i2c_add_adapter().

* Add a blank line before return in i2c_add_numbered_adapter().

This patch is purely cosmetic.

Signed-off-by: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Wolfram Sang <w.sang-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
---
 drivers/i2c/i2c-core.c |   13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -935,16 +935,17 @@ out_list:
  */
 int i2c_add_adapter(struct i2c_adapter *adapter)
 {
-	int res;
+	int id;
 
 	mutex_lock(&core_lock);
-	res = idr_alloc(&i2c_adapter_idr, adapter,
-			__i2c_first_dynamic_bus_num, 0, GFP_KERNEL);
+	id = idr_alloc(&i2c_adapter_idr, adapter,
+		       __i2c_first_dynamic_bus_num, 0, GFP_KERNEL);
 	mutex_unlock(&core_lock);
-	if (res < 0)
-		return res;
+	if (id < 0)
+		return id;
+
+	adapter->nr = id;
 
-	adapter->nr = res;
 	return i2c_register_adapter(adapter);
 }
 EXPORT_SYMBOL(i2c_add_adapter);