IDE PIO data must be written, for example, at 0x1f0. You cannot
do word or dword writes to 0x1f1..0x1f3 to access the data register.
Adjust the ide_portio_list accordingly.
Cc: John Snow <jsnow@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>