All dynamically allocated sysfs attributes MUST be initialized explicitly. Otherwise lock debugging fails. Change-Id: I8f77857831221b5ceddb43f9d161c3bf4ca049d6 Signed-off-by: Remi Denis-Courmont <remid@nvidia.com> Reviewed-on: http://git-master/r/1145929 Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com> GVS: Gerrit_Virtual_Submit Reviewed-by: Juha Tukkinen <jtukkinen@nvidia.com>