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/i2c-pca-isa.c b/drivers/i2c/busses/i2c-pca-isa.c
index 407840b..cc6536a 100644
--- a/drivers/i2c/busses/i2c-pca-isa.c
+++ b/drivers/i2c/busses/i2c-pca-isa.c
@@ -156,7 +156,7 @@
 
 static void pca_isa_exit(void)
 {
-	i2c_pca_del_bus(&pca_isa_ops);
+	i2c_del_adapter(&pca_isa_ops);
 
 	if (irq > 0) {
 		disable_irq(irq);