layer.conf: add LAYERSERIES_COMPAT
layer.conf: add LAYERSERIES_COMPAT

Signed-off-by: Wojciech Slenska <6d08e0a194905139c9551f1fd05fe42174393317@gmail.com>
Acked-by: Stefano Babic <2c2905e0c2877c7e4ce40c7425e972302953fda5@denx.de>

sbabic/meta-swupdate,sbabic/meta-swupdate