KVM: s390: selftest: memop: Fix integer literal

KVM: s390: selftest: memop: Fix integer literal

The address is a 64 bit value, specifying a 32 bit value can crash the
guest. In this case things worked out with -O2 but not -O0.

Signed-off-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
Fixes: 1bb873495a9e ("KVM: s390: selftests: Add more copy memop tests")
Reviewed-by: Thomas Huth <thuth@redhat.com>
Link: https://lore.kernel.org/r/20230206164602.138068-8-scgl@linux.ibm.com
Message-Id: <20230206164602.138068-8-scgl@linux.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>