s390x: pv: Remove sclp boundary checks

s390x: pv: Remove sclp boundary checks

The SCLP boundary cross check is done by the Ultravisor for a
protected guest, hence we don't need to do it. As QEMU doesn't get a
valid SCCB address in protected mode this is even problematic and can
lead to QEMU reporting a false boundary cross error.

Fixes: db13387ca0 ("s390/sclp: rework sclp boundary checks")
Reported-by: Marc Hartmayer <[email protected]>
Signed-off-by: Janosch Frank <[email protected]>
Tested-by: Marc Hartmayer <[email protected]>
Reviewed-by: Christian Borntraeger <[email protected]>
Reviewed-by: Thomas Huth <[email protected]>
Reviewed-by: Collin Walling <[email protected]>
Acked-by: Halil Pasic <[email protected]>
Acked-by: David Hildenbrand <[email protected]>
Message-Id: <20201022103135[email protected]>
Signed-off-by: Cornelia Huck <[email protected]>