[S390] cio: remove stsch
Since 8821d24cd261aede9b0436cd3252b17a60ccc33a we no longer
use the plain stsch inline function but the one which can
handle exceptions. Remove the unused function.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
authored by Sebastian Ott and committed by Martin Schwidefsky a65a3e82 2ffbb3f6