B53_MIR_CAP_CTL
b53_read16(dev, B53_MGMT_PAGE, B53_MIR_CAP_CTL, ®);
b53_write16(dev, B53_MGMT_PAGE, B53_MIR_CAP_CTL, reg);
b53_read16(dev, B53_MGMT_PAGE, B53_MIR_CAP_CTL, ®);
b53_write16(dev, B53_MGMT_PAGE, B53_MIR_CAP_CTL, reg);