adm1027: add return statement

Adds a missing return statment which will stop misleading the users

Change-Id: I53741f1136b396e9493ce959b54efc00c9b09764
Signed-off-by: Vikram Narayanan <vikram186@gmail.com>
Reviewed-on: http://review.coreboot.org/522
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/drivers/i2c/adm1027/adm1027.c

@@ -35,6 +35,7 @@ static void adm1027_enable_monitoring(device_t dev)
 	result = smbus_read_byte(dev, ADM1027_REG_CONFIG1);
 	if (!(result & CFG1_STRT)) {
 		printk(BIOS_DEBUG, "ADM1027: monitoring would not enable\n");
+		return;
 	}
 	printk(BIOS_DEBUG, "ADM1027: monitoring enabled\n");
 }