sata_mv initializes unused ioports fields including bmdma_addr to
NULL.  As later changes will conditionalize BMDMA, this makes sata_mv
unnecessarily dependent on BMDMA.  Remove the unnecessary
initialization.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
        /* special case: control/altstatus doesn't have ATA_REG_ address */
        port->altstatus_addr = port->ctl_addr = shd_base + SHD_CTL_AST;
 
-       /* unused: */
-       port->cmd_addr = port->bmdma_addr = port->scr_addr = NULL;
-
        /* Clear any currently outstanding port interrupt conditions */
        serr = port_mmio + mv_scr_offset(SCR_ERROR);
        writelfl(readl(serr), serr);