RZG3S_PCI_REQDATA
writel_relaxed(0, host->axi + RZG3S_PCI_REQDATA(0));
writel_relaxed(0, host->axi + RZG3S_PCI_REQDATA(1));
writel_relaxed(data, host->axi + RZG3S_PCI_REQDATA(2));