[S390] cio: update path groups on logical CHPID changes.

CHPIDs that are logically varied off will not be removed from
a CCW device's path group because resign-from-pathgroup command is
issued with invalid path mask of 0 because internal CCW operations
are masked by the logical path mask after the relevant bits are
cleared by the vary operation.
Do not apply logical path mask to internal operations.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/cio/cio.c

@@ -191,7 +191,7 @@ cio_start_key (struct subchannel *sch,	/* subchannel structure */
 	sch->orb.pfch = sch->options.prefetch == 0;
 	sch->orb.spnd = sch->options.suspend;
 	sch->orb.ssic = sch->options.suspend && sch->options.inter;
-	sch->orb.lpm = (lpm != 0) ? (lpm & sch->opm) : sch->lpm;
+	sch->orb.lpm = (lpm != 0) ? lpm : sch->lpm;
 #ifdef CONFIG_64BIT
 	/*
 	 * for 64 bit we always support 64 bit IDAWs with 4k page size only