regulator: ab8500-ext: Make the return type of ab8500_ext_regulator_exit() void

ab8500_ext_regulator_exit() never fails.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/include/linux/regulator/ab8500.h b/include/linux/regulator/ab8500.h
index 90b8b5a..7c5ff0c 100644
--- a/include/linux/regulator/ab8500.h
+++ b/include/linux/regulator/ab8500.h
@@ -338,6 +338,6 @@
 
 /* AB8500 external regulator functions. */
 int ab8500_ext_regulator_init(struct platform_device *pdev);
-int ab8500_ext_regulator_exit(struct platform_device *pdev);
+void ab8500_ext_regulator_exit(struct platform_device *pdev);
 
 #endif