s390/io: add ioport_map stubs
s390/io: add ioport_map stubs

add ioport_map stubs to make vfio build on s390.

Signed-off-by: Frank Blaschka <21d2885f2483c40eac4dc83911cae13ca42cd9fd@de.ibm.com>
Signed-off-by: Martin Schwidefsky <52616596d8f5df0d597e85ab515377f92f939c68@de.ibm.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs