MHI_CTRL
qwx_pcic_write32(sc, MHI_CTRL, MHI_CTRL_RESET_MASK);
reg = qwx_pci_read(sc, MHI_CTRL);
reg = qwx_pci_read(sc, MHI_CTRL);
qwx_pci_write(sc, MHI_CTRL, reg);
qwz_pcic_write32(sc, MHI_CTRL, MHI_CTRL_RESET_MASK);
reg = qwz_pci_read(sc, MHI_CTRL);
reg = qwz_pci_read(sc, MHI_CTRL);
qwz_pci_write(sc, MHI_CTRL, reg);