lib/sysfs: add sysfs_devno_is_lvm_private() from libblkid

Signed-off-by: Karel Zak <kzak@redhat.com>
lib/sysfs: add sysfs_devno_is_wholedisk()

Signed-off-by: Karel Zak <kzak@redhat.com>
fdisk: use sysfs_devno_is_wholedisk()

Signed-off-by: Karel Zak <kzak@redhat.com>
sfdisk: use sysfs_devno_is_wholedisk()

Signed-off-by: Karel Zak <kzak@redhat.com>
build-sys: remove obsolete wholedisk.c

Signed-off-by: Karel Zak <kzak@redhat.com>