The use of the CONFIG_ISA_MMIO setting was removed in

  commit 61fcb628
  Author: Paolo Bonzini <pbonzini@redhat.com>
  Date:   Mon Jul 22 15:54:24 2013 +0200

    isa_mmio: delete

but this commit only removed it from some of the default
config files.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
Message-Id: <1473096320-1638-3-git-send-email-berrange@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>