Recognize all VDO volumes
Recognize all VDO volumes

Updated vdo volume detection to be all subdirectories of /sys/kvdo/ which contain an 'instance' file. VDO volumes can have arbitrary names, causing the existence of the directory /sys/kvdo/[name], but all running VDO volumes have an 'instance' file in that subdirectory.
adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp