i2c: Discard the i2c algo del_bus wrappers

They are all only calling i2c_del_adapter, so we may as well do
it directly.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/drivers/i2c/busses/scx200_i2c.c b/drivers/i2c/busses/scx200_i2c.c
index 8ddbae4..6cd96e4 100644
--- a/drivers/i2c/busses/scx200_i2c.c
+++ b/drivers/i2c/busses/scx200_i2c.c
@@ -116,7 +116,7 @@
 
 static void scx200_i2c_cleanup(void)
 {
-	i2c_bit_del_bus(&scx200_i2c_ops);
+	i2c_del_adapter(&scx200_i2c_ops);
 }
 
 module_init(scx200_i2c_init);