mfd: Make jz4740_adc_driver static

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/mfd/jz4740-adc.c

@@ -328,7 +328,7 @@ static int __devexit jz4740_adc_remove(struct platform_device *pdev)
 	return 0;
 }
 
-struct platform_driver jz4740_adc_driver = {
+static struct platform_driver jz4740_adc_driver = {
 	.probe	= jz4740_adc_probe,
 	.remove = __devexit_p(jz4740_adc_remove),
 	.driver = {