s390/cio: remove pm support from eadm-sch drivers

The 'commit 39421627 ("s390: remove broken hibernate /
power management support")' removes the pm-support. Remove the
unused functions in eadm-sch drivers.

Signed-off-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>