adm1027: add return statement

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>