Revert "ioport: remove LITTLE_ENDIAN mark for portio"

Revert "ioport: remove LITTLE_ENDIAN mark for portio"

This reverts commit c3cb8e77804313e1be99b5f28a34a346736707a5.

The scenario where I/O ports are accessed with DEVICE_LITTLE_ENDIAN
endianness now works and will soon be unit tested.  Since the PortioList
indirection assumes little endian, define portio_ops the same way.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Message-id: 1374501278-31549-16-git-send-email-pbonzini@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>