The parameter is always zero except when registering the three internal
io regions (ROM, unassigned, notdirty).  Remove the parameter to reduce
the API's power, thus facilitating future change.
Signed-off-by: NAvi Kivity <avi@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

Namely the new xilinx_ethlite used by mircoblaze.
Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>

Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>